Quick and Easy Questions (please read the OP)

[Reece]

Because the Flight power costs OM =p

To be fair, though, so do Stat Upgrades and so does the Super Speed Power, yet normal vehicles are still allowed to travel up to 80 mph, in exchange for being fragile enough that Primes can easily destroy them in a graded fight.

And if anything, this drawback would be even more pronounced in flying vehicles, since anyone dumb enough to try and fight in one would soon find themselves falling potentially dozens of metres to the ground when someone shot their ride a couple times and sent it plummeting from the sky.