Once I realized my introversion was psychological and mutable, not some fixed aspect of my personality, it changed my life.
We tend to anchor ourselves to labels. Lots of introverts I meet limit themselves in life needlessly because "I'm an introvert!" I see my old self in them.
Good on you. But this doesn’t apply to everyone. Hell, I’d even be willing to bet that your case is extremely niche.
Introversion can be a byproduct of so many different things that saying “it’s just a label” is not only absurd by itself, but utterly disrespectful too. It can be a choice too, sure, but that’s not the case for quite a lot of people.
I see my old self in what you’re saying. I used to be extremely extroverted, spending nearly all my free time socializing, but now I find much more life satisfaction as an introvert. I derive a lasting sense of pleasure and peace from the things I build, especially physical things, while social interactions only created at best a fleeting sense of satisfaction. I also have much more time for reading, contemplation, and enjoying nature.
I get more than enough social time from my partner and a small handful of friends that I see on occasion. I lived quite a full social life, with a huge variety of people and activities, yet surprisingly I don’t find it all that memorable or important in retrospect. It’s a similar feeling to looking back on one of my former careers.