Yeah, that's complicated. I guess from my own experience related to stress and going out of comfort zone what I can speak to is that I have trouble going out of comfort zone when I'm doing something I'm not interested in and when I feel like I have to pretend that I'm someone I'm not. E.g. normal social situations where I have to pretend that I have favourite food, favourite place to go, or I even know places. I zone out on 90%+ topics, and I can't understand why on earth people are talking about these things.

But if I'm passionate about something, I will be excited to present to a large audience, to go through things that you might consider going out of comfort zone, be competitive etc.

Now in school I had so many situations where I had to "be out of comfort zone" in things I wasn't interested in. Social situations I didn't enjoy. I left things to last minute, then stressed, lost confidence, massively. Eventually dropped out of high school.

Luckily managed to get a successful career going where I've been passionately moving forward, and this has massively boosted my confidence too. Now I'm a successful member of society, make quite a bit, pay taxes, etc, and can build the exact life that I want and works out best for me.