Only if you pay the tonnage for them
You do understand microbursts only accrue in a storm front. There’s also a big difference between something depending on lifting surfaces to fly and something that’s using a gravity powered flight system. But you can punish your players by making them do consistent piloting checks every time they fly their ship if you want. But me I’ll stick to the book which states “ A streamlined ship is designed to enter a planetary atmosphere and can function like a conventional aircraft. Pilot checks are required in high winds and other extreme weather.” And I expect most merchants would not chance landing in extreme weather.
You don't seem to understand that they OCCUR, you are assuming terrestrial weather, and you've gimped your controls. And your gravity thrust is balanced based on steady conditions, not varied winds that can push large objects tens of meters. You then trash your argument by stating that you are going to use the rules that say the craft can function like conventional aircraft... and you've degraded your sensors and your ability to react to information you aren't getting in time.
A microburst IS extreme, and rather speedy, REQUIRING a pilot check, and this makes the THIRD TIME I've said
Abort or wear brown pants... I'm not sure what part of that you don't comprehend, since it is what YOU said as well.
Now, how do you determine that something like that happened? A routine pilot check or a secret roll. Failing that roll indicates a potential incident, which the players must react to. Could be another vessel going off course, could be a flock of alien "birds" that explode on contact... could be a microburst. Then they roll an appropriate skill to alleviate the situation. It breaks up the routine and reminds them not to let their guard down.
Bottom line is that you are risking crew and passengers for FOUR TONS of cargo.
As stated, YOU can reward reckless people in your game. I will continue to keep small bridges on bricks that don't worry about weather. And yes, I punish stupid players, but generally not with instadeath. Anything that intentionally reduces your ability to pilot a ship that will routinely need piloting rolls borders on stupid. That includes fancy maneuvers to shave time in landing. Operating while impaired (like with a small bridge) is a reason for requiring a pilot check at my table.
But you do you.