Who said anything about supersonic speed?

And how do you trust that normal people aren't going to walk/run/crash into you?

I'm talking about how if some people can inherently locomote in an unusual as naturally as walking, then it should be treated like walking.

If I have wings but need a special license to be able to fly, that's only fair and just if everyone also needs a license to walk.

Biking is not comparable, because biking is a learned skill 99% of people... Though I'd argue that if someone's quirk is that their lower body is a bike that they likewise be exempted from biking restrictions in the grounds that for them, biking is walking.