Given the fact that car infrastructure competes for resources with public transport infrastructure, and is vastly more expensive per person-km, and vastly more dangerous as well, prioritizing efficient use of public resources trumps personal comfort when looking at this. The same can't be said for housing, so the comparison is not relevant. Plus, there are very objective reasons for which privacy is an absolute requirement at home (mostly to do with vulnerability and sexual behaviors), which also don't apply to cars; especially since the kind of privacy you get in your own car is actually quite limited anyway - it would be both illegal and quite unsafe to drive around naked, at least in a bad neighborhood, for example.
No one is saying people must give up their cars. I just want more options.
Your housing analogy is also perfect. Nearly 80% of the land in my city is single-family zoning so it’s necessary to buy an expensive detached home to live in my city. I would like more choice in housing, transit, etc.
Unnecessary is the perfect word and it’s not strong at all
For lots of people in cities or large portions of Europe, going without a car is much better.
For example the Netherlands simulatenously has world class public transport infra and the happiest and most satisfied drivers. 60% of the country still drives, it's just that it's not the only option and the drivers also take public transport and bike when it's more convenient than driving.