Very true! It’s a funny dynamic where audience members are sometimes intimidated to approach speakers, while the speaker themselves really wishes people would approach them (and is worried about what it means if nobody does).

Absolutely this. One of the main reasons to give a presentation at a conference is that it means you can talk to people about it afterwards. "Hey, I liked your talk" is a freebie ice-breaker for anyone else, so it's much easier for them to strike up a conversation with you.