I obviously don't know where you live, but it sounds crazy to people in the US because in most of the US public transportation an bicycle infrastructure is not where it needs to be to make them viable for daily life. In places where public transportation is better (like say NYC), car ownership is the exception rather than the rule.

The reality is cars have a massive public cost that we all subsidize via various taxes and paying higher prices for goods already. Keeping up roads, traffic signals, parking structures, etc. is very expensive. Higher taxes on vehicles (and/or gas) helps put the cost directly where it belongs.

Obviously instantly going to 100% tax on vehicles in most of the US would be a complete disaster right now because of the above lack of public transportation, etc. but it's not a crazy idea if you give people alternate means to get around and structure your cities so that 1 hour (or longer) commutes via car are not the norm.