"The roads are busier with near silent, zero tailpipe emission vehicles now"

Seems like a nicer problem to wrestle with than

"We have a bunch of young people injured or dead on bicycles or as pedestrians each year"

Like, there's not even any contest as to which of those problems i'd rather face.

If i was to uncharitably re-frame your argument, it's simply pulling up the ladder to avoid future generations having an option to take up a new form of mobility.