He needs to give everyone else a fair shot

true

I assume it makes things fair. That said, Amy was the only one with a car in Sonic R.

It made no sense. Why couldn't they just have her run but nah Sega wanted Amy to be in a car

Guess Amy's just a car person. Er, hedgehog.

But in riders everyone except for Eggman and the Security corridor robots owns a hoverboard

and the wheel robots are exclusive to zero gravity

Huh.