Advanced sensors detect Battledress. Yep.
High energy battlefields and EMP/ECM make a mush of advenaced sensors.
Infantry cannot survive being fired at by tanks secondary weapons. Yep.
Cover, ambush, tactics, keeping out of the line of fire. Battledress or combat armour has enough armour to survive shrapnel and area bursts meaning you need to line of sight them with something big enough to kill them. So they stay out of line of sight.
Infantry weapons cannot damage tanks. Yep
FGMPs are not for shooting the front armour of a tank, thats what man pack missiles/rockets/fusion bazookas are for. Hit the flanks, hit the rear, hit the engine deck. Only a soon to be dead infantryman of any kind attacks the massive front armour of a vehicle. Plus Battledress with its enhanced strength can carry bigger and heavier anti tank weapons than the grunts in kevlar can.
Tanks mounting anti missile point defences are immune to missiles, not if you fire them from close in or volley then or spoof the tanks sensors and fire control. Tank/Anti Tank is a see saw constantly going one way or the other. Tech 15 tanks in a city are still in the worst possible area for a tank to be in and thats where infantry are a real threat.
If you are firing warheads that use some form of self forming shot that is able to penetrate side armour from 20m and you fire that missile from 50m and the missile is smart enough to fly through the windows of a building the missile warhead fires before the tank has time to even detect it. Remote weapon platforms, directional anti tank charges and more besides will exist in the infantry ToE. Battledress troops can carry more of them. Tactics will continue to evolve in the man verses machine war.
Governments should be concerned about combat armour and battle dress and FGMPs and lots of other things. Personally I would be more concerned about the rebels getting combat armour or carapace which they could buy in large numbers, need no special training to use and make them very resilient against police and local security. Battledress supply and maintenance makes them an unlikely buy for iregulars or small mercenaries. If your security and police are armed with 3D weapons an 8 or 10 point armour set is very effective, unless your police are packing guass rifles that is.
A lot of this debate is highlighting the fact that Battledress and Marines are as obsolete as the cutlass. Fluff aside no one uses the cutlass.
If your enemy needs to deploy slow firing and inaccurate anti tank weapons against you, if your marines can pack enough ammo and supplies to operate for days on a raid away from supplies, when your battledress troops not only have the ability to carrier heavier weapons but also have enhanced speed and targeting/squad co-ordination that allow them to run rings around a defender, when your marines can operate in just about every environment without needing to stop and put on breathers or environment suits or can move through those burning buildings, then you just need to have them to win.
An imperial squadron can deploy several companies of them. Against them a normal force of a few tech levels below needs to deploy tens of thousands of troops to cover the possible targets in enough force to hold off the Marine strike. If the navy can secure orbit then those tanks that are so hard for the infantry are killed from orbit as soon as they are detected on the marine data nets.
Troops in battledress are hard hitting, fast hitting and very intimidating. They are not super soldiers, they are an elite who should be considered to have the skills, training and tactics that comes with that. You don’t put new recruits or militia in battledress. You put some of your best troops in battledress and it acts as a force multiplier to turn small elite units into something very scary to your enemies. Mess with the Imperium and within days you could have battledress equipped marines tearing you a new bodily orifice.
IanW. In relation to a few of your specific comments.
Battledress boarding a ship. Few people are going to self destruct a ship, unless they are facing being tortured to death. What they will be doing is destroying the illegal cargo, purging the computer core to hide the location of the secret base etc. Aside from the Ine Gavar even pirates are not going to self destruct, it depends on YTU of course but there are trials, prisons to escape from, judges to buy off etc.
Finally, if you are relying on large scale violations of the Imperial Rules of War to win a war, I'd suggest your training, tactics and doctrine need re-assessment.
I don’t get where this came from unless you are referring to my comment about removing civilian casualties from the equation in the tech 8 vs tech 6 situation which was started by the middle east comments.
What I meant was when your higher tech infantry operates in an environment where they don’t need to worry about civilians (rural battlefields, industrial districts, areas evacuated of non combatants etc) then unless the lower tech insurgence type troops have a huge advantage in numbers they will lose to a higher tech force that is properly trained and equipped to face them.
Resorting to slow firing, inaccurate, ammo limited anti tank weapons to fight against a better defended, well trained higher tech force is an act of desperation. It is the acceptance that you cannot face them, cannot build or buy weapons that are effective against them and cannot train your troops well enough to level the equipment imbalance. It doesn’t make the guerrilla force better, it just makes them irregular/militia/guerrillas facing a superior enemy.
As always with Traveller. If you don't want Battledress in YTU, then don't have it.