You want someone to be friends with you, as you actually are. And that means you need to be friends with them, as they actually are, even if you worship different brands or vote for different movies.
It’s not any more or less terrifying than in previous times, but as you wrote “you don’t really need to interact with so many different people”.
I would shorten that to “you don’t need so many people anymore”. Another factor is you can easily find more agree-able people (or bots) to spend time with, such as on this website rather than a neighbor.
Margaret Thatcher got quite a lot of stick for her quote about how there is no society and its just individual people that look out for themselves first and foremost before anything. But I'd say there's more truth to that than I'd want to believe. What stops that from being true to my mind is people being very intentional about creating a society by engaging with others.
I'm always interested in people's stories about adult friendships or loneliness crisis etc. and what I tend to see is that when people start being intentional about engaging, it usually ends up with them finding new friends. It's just easy to sleepwalk, with everything going on, into not engaging. Newish parents are very apt example of this
facts
I can’t and don’t see an easy solution for it, to be honest.
I’m kind of horrified at people saying they had/have to work at their best friendships as with my best friends, everything is seamless.
There are no misunderstandings. We never have to forgive each other. We never even need to clarify things for each other much, as we are that well aligned.
Granted it may not be possible, but ideally go find a better match in a friend.
There's nothing wrong with having to work at friendship. For years I had a friend that I looked up to (and, as it turned out looked up to me). We were both constantly striving to justify the other's faith and respect. It was a lot of work but incredibly valuable for both of us.