The use cases don't overlap for a lot of car's usage. And the only people pushing public transports are people who never use them daily, because if they did they would know how bad it is to have train delay or cancelation twice a week, strikes at least 3 times a year, issue with tramway hitting cars or people fighting inside it, not to mention the permanent insecurity and piss odour in the subway.
All the issues you mention could be solved by more investment in public transport. I'm assuming you're from the states — try taking public transport in a country where it functions well, and see if you change your mind.
> All the issues you mention could be solved by more investment in public transport.
No. Insecurity won't go away just because stations look nicer. And for trains the problem is not investments, it's the civil servant mentality of people working there that don't give a shit about users and want to work as little as possible. The national railways company is well known for being a sinecure (it was personally confirmed by my brother who was told not to work too hard -- he was already not working a lot -- when doing an internship there).
And I'm not even talking of the huge ticket prices, the machines not working, the lack of accessibility (better not have a big luggage or god forbid being in a wheelchair), restricted hours when the services are working, etc. There is a lot of things to hate about public transportations, at least when it's not done properly. It's fine in Japan but even there there are issues, Kyoto buses for instance is a shitshow.
> I'm assuming you're from the states
You are assuming wrong, I'm from and currently living in France.
