Doylist explanation: it would be too expensive for the FX department.
As it happens, the same worldbuilding project I mentioned in another post here sort of addresses this. The same aliens mentioned there don’t use artificial gravity at all. Being arboreal creatures they’re well suited to microgravity and can happily live permanently in zero G. Upon meeting humans and learning that we want artificial gravity (specifically centrifugal gravity), they wonder why we spent all the effort to get away from gravity only to spend even more effort to bring it back.
Since human orbital colonies take the form of O’Neil cylinders, you can cut off the gravity by halting the cylinder’s rotation. If stopped abruptly enough this would cause a lot of damage initially as objects go flying. It would also put the terrestrial, bipedal humans at a disadvantage compared to the aliens with five prehensile extremities.
Doylist explanation: it would be too expensive for the FX department.
As it happens, the same worldbuilding project I mentioned in another post here sort of addresses this. The same aliens mentioned there don’t use artificial gravity at all. Being arboreal creatures they’re well suited to microgravity and can happily live permanently in zero G. Upon meeting humans and learning that we want artificial gravity (specifically centrifugal gravity), they wonder why we spent all the effort to get away from gravity only to spend even more effort to bring it back.
Since human orbital colonies take the form of O’Neil cylinders, you can cut off the gravity by halting the cylinder’s rotation. If stopped abruptly enough this would cause a lot of damage initially as objects go flying. It would also put the terrestrial, bipedal humans at a disadvantage compared to the aliens with five prehensile extremities.