He used it to ride up the arm of that one huge guy, and he uses his quirk to get up to his apartment on top of that building. Also, it's really hard to hit someone on the ground who's going as fast as a vehicle, even if it's a motorized scooter. That's like...actually fast still?
Alright if he can get up a vertical surface then it is a bit better than i remembered. Would make him a good firefighter/resque worker then.
But else, when his mobility is so bad he dont dare going that fast normally then i dont think its going to be of much use. I mean yes its going to be hard to hit him, especially if he is going away from you. But it will also be really hard for him to hit.