I just don't want to see some zealot telling me I can't have a car, and that I am some sort of evil person for having one.
Further, not everywhere is suitable. Someone riding around cities near me have got high humidity and steep hills to deal with : you don't ride a bike without some serious fitness. Those cruisy bikes you see in Amsterdam, Copenhagen and Cambridge are of no use.
What I'm saying : there should be no laws against this type of thing, and no laws saying you should do it. Entirely personal choice all round.
For my part I have a large car but work from home, so it gets driven maybe once per fortnight. There's no way I would part with it : it's my ticket to freedom when I do choose to get out and about. And I enjoy it thoroughly when I do.