It barely fits in the bloody car park. So bad for pedestrians and the environment.
Yes, however with that it’d be more expensive to administer taxation on bicycles etc. Than what they’d bring in… So not really worth doing at all.
Since the amount of damage caused by bikes to infrastructure would be small, the govt could just slap a tax for the cost to the purchase price of every bike. Not saying I’d agree with it but there are ways to make all road users pay their share.