UKF forward assembly is fragile.
Soviet FHQ is fragile.
USF major+ambu combo is fragile.
Wehr command+medic bunkers are fragile.
Trucks are anything but fragile.
None of those are 650 man power and 40 fuel when fully upgraded, well maybe except for the Soviet FHQ but nobody uses that anyway.
The med HQ is a tech building that also produces your units unlike any of the ones you mentioned.
Plus you can move the Major and Ambi, unlike any of the others.
I'm forgetting the cost of the truck itself, so 100 mp and 15 fuel on top of that, so 750 and 55 fuel in Total, any of those cost as much?