I didn't think people in tech were any weirder than the general population. Then I kept meeting infra engineers from big tech and I understood where the stigma came from. These folks make up the majority of engineers in big cities. You don't need thousands of engineers to work on the Instagram/FB app itself. You need thousands of engineers to make it scale to billions of users. There's always less openings for product engineers than there is for infra.
My behaviors are pretty normal. When I avoid the conversation, I get a lot more good feedback and people at least in NYC assume I'm in finance or something. It's when they find out that I'm in tech that they really start to distance themselves. I've learned to avoid the conversation due to this.