I don’t think you read the post very well or you’re picking on things just to say “No, I’m an introvert and so I can’t and that’s the end of that”.
It doesn’t say just go out and do things. It says “whenever you do these things, just do this instead”. And it shows some clear suggestions to try. Put down phone and say yes to any opportunity are what stick out for me. None of them are very risky. Maybe you won’t talk to your neighbors, but you’ll have to want it to change it, it won’t come to you. And so it gives some suggestions of things that are potentially available to you.
My life changed quite a bit after I watched Yes Man and decided to give it a try. It made me realize how much I would said no to things for reasons that were 100% made of negative assumptions. It was all in my head. I didn’t go as far as Jim Carey but I started saying yes or asking if I could join to things I would normally decline and just get FOMO at home.
It’s a very introvert lonely person thing to say “I tried and I suck therefore I can’t” and now I answer to that “Can’t never could”. And I feel like I can say that because I was one of them.
Yes I sucked too, I still think I’m not good at small talk, so what? I stay away from my phone in social gatherings and just observe, at some point just by being engaged you’ll have something to say. Some people might even like you because you’re not “the annoying one who wants to hear themselves talk”.
All it takes is not “go out and do things” it takes saying yes and not sheltering yourself, it takes not running away from the opportunity. It all cascades after. It’s like compound interest if socialization. Once you open yourself to one thing and keep investing in that, lots of gatherings open.
Right now I feel like I need to decline some because I get a bit socially exhausted at times, but 6 years ago i would get depressed on the weekends because I wanted to go do something and had no one to do it with.