This was an interesting perspective, thanks for sharing it. Its all very geographical context dependent I suspect and that's where difference in perspective can be quite different.

One thing though is why you see new people as any different than strangers? I'm not a Quaker or ever attended a quaker meeting (but have always liked the ethos of the vibe) so don't know how that goes. But i've spent time in christian churches in my younger days and even though we were all there for the same reason, those people were still also strangers. Some already had their cliques they'd speak to and catch up with and I'm sure if someone outside that spoke to them the same double take that initially occurs talking to any new person or stranger would still occur there. Some people would want to continue chatting, some people would rather just talk to whoever they were talking to before. But its still fundamentally the same thing as talking to (or attempting to talk to and being shutdown by) someone doing the same thing you are currently doing, whether that's being on a train or sitting at a cafe etc.