I dont understand your comment.

90% of Japanese residents live in, essentially, a walkable megacity, and plenty of them ride motorcycles on the country's many tracks (which you would expect, since Japan houses several of the top motorcycle manufacturers). They don't have any issues participating in their hobby, and you wouldn't either.

Note that this holds without even having to mention that holding the ability for millions of people to be independent and mobile without needing to purchase and maintain a vehicle against a niche and expensive hobby is ridiculous. But there's no need to bring that up because we can have both.