Yeah, I personally would choose a bike over a scooter. However I would much rather have an drunk idiot on a scooter than driving a car.
If we can get people to go to bars/etc on rental scooters then they won't have a car to get back in when they are drunk. Ideally they walk, bus or taxi at that point (new public education campaigns can help with this), but even if they get on a rental scooter, that's still a win for public safety.
I'll point out that it is much easier to take a taxi home and leave a rental scooter at a bar then to have to leave your car there overnight and go back the next day.