Is it? I have my personal anecdote. Most outrageous, fearful and dangerous (for my life and health) interactions with other people I had in public transport.
It sounds like you recognise that they encourage human interaction, though. Learning how to navigate human interaction is very rewarding and it's at the core of what we're losing.
Not sure I want dangerous human interactions and ability to navigate them to learn. Pretty much how I don’t want to learn navigating jungle on practice.
Fundamentally people don't want to be around each other, certainly not strangers, and the perceived (likely even real) consequences of it are an expected net loss.
That's a little extreme. There are country mice and city mice. City mice want to live inside cities and eliminate cars. That's great for them. Country mice, like me and I suspect you, want city mice to stay in the city and not ruin the nicer, quieter living space outside.
Now, if we could just get cities to keep their light pollution within the city, it would be a nicer world.