I think part of the problem is that social media is normalized and it is easy. It is way easier to engage socially (or at least you feel like you're engaging socially) with likes and lurking and stuff. It is way harder to put on pants and go out and it is normalized to do so (phrasing like bedrotting is super casual, whereas it is actually really hard to maintain an eating disorder because you have to be constantly hiding it from people).

Also I think there's more groups whose social norms online teach you to be repulsive offline and again there's not enough social pushback against it. We do need to be harder on casual edginess online because it is teaching habitual behaviors that make it hard to engage socially. Your 50 year old hiking buddy is not going to understand your soycuck joke you are trying to show him on your phone. Your average wine mom at women-only book club is not going to love if you insist on talking about banning trans people from the club because they're "men invading the women's spaces" especially when there's very likely 0 trans people to exclude in the first place on account of trans people being rare.

Lastly there is usually a ton of stuff happening but the instructions on how to engage with it is nebulous. People who know the algorithm find it easy, the people who don't know the algorithm find it super hard. And IDK how to solve that because there's so much going on in people's heads that they don't realize the people around them seriously aren't scrutinizing them that much. There's like a socialization death spiral where every small awkward interaction hurts way more when you don't have enough experience to know that the small awkward interactions are normal. So you can't tell someone "just go to book club" because they'll go, have 1 normal situation like mishearing someone and then decide they are so embarrassed they can never go to book club again-- but since it is so normal it happens at every social event and they end up lonely.

You actually bring up the biggest obstacle to my tentative idea for this Sunday, of holding up a sign that points to a time/place for a casual conversation with strangers. I thought this would be a good way to get very lonely passers-by out of their comfort zone and into a situation where they have a chance to make friends and bond, but the absolute diversity of interests is the main show stopper. My first thought was to essentially avoid sensitive topics on the poster, such as religion and politics, but it still leaves the huge diversity of potential common interests open. So I started doing some research on the most common hobbies that people have in cities and that can be talked about casually, in hopes of finding like 5 ot 6 to write on the sign to get people into the coffee shop.