A good pilot can help, as can software (see my previous post).
Yep, but that is now two jobs that need your "DEXiest" character (with fixed mounts that can be the same person though - the extra DM-2 for the pilot operating turrets is sub-optimal).
Obviously the intended way to cover it is the skill package, as was previously mentioned. A group that is expected to get into space combat should be taking an appropriate skill package, just as one that expects to get into ground combat takes one of those, or a group facing an espionage campaign takes one suited for that.
Which works for that paradigm but not if you have campaign that follows the normal Traveller "have gun will travel" route where this month it is espionage, next month a body guarding job, and at any point dealing with repercussions of what you did last week in whatever form that takes and dealing with the random encounters of travelling through the universe.
And... this MAY be Traveller heresy, given how few real jobs there are in space combat to fill... but you CAN hire someone to shoot the ship's guns.
Which is yet another NPC that the referee has to manage (but that requires even more work as it is a semi-permanent feature). Hireling NPCs really can impact player agency.
A droid gunner achieves the same end, is less difficult to manage, can be expected to do exactly what it is told preserving player agency and is not such an ongoing financial drain on the party (wages, life support and possibly extra accommodation).
A single function robot only needs a basic brain and so will be cheap. As a side benefit whilst it could do simple additional tasks (like watch over the ship) which would be tedious for a player character to do it is not so versatile that the players might consider it an extra hireling to take on the ground adventure as well.
Players can of course choose to have a whole heap of robot helpers, but that will be a solution the players have found to the problems they don't want the characters solving.
In the game with my daughter* she wants a raft of robot assistants (pets really) to accompany her (she has been working with a crew droid and a labour droid so far but
really wants a Shadow Security Robot). She isn't comfortable at the moment with roleplaying the interactions with NPCs but is quite happy to direct hirelings on a transactional basis. Most NPCs would react poorly to that, but for robots it is ideal. I think she is also concerned about getting a person killed, but a robot can be repaired (or at least the brain backed up and installable into a replacement).
*She is playing the character she rolled, and that means some rubbish characteristics. This is preparation for when she gets out into the real world where she won't get to save and reload every decision she makes. Playing what you got is one of the most valuable aspects of Traveller (and OSR generally) to me. She is solving the limitations of her character in exactly the same way humans have always solved them, with their brain and with tools.