I find this to be bad advice. People already do the activities they enjoy and don’t do the activities that don’t enjoy.
Clearly the activities they enjoy do not involve meeting women. For me, this translates to weight lifting (few women lift; if there are women, there is a trope for creepy gym guy and there isn’t much socialization outside of the men’s locker room) or coding (another solo experience).
Try new things. Try things that are social and are uncomfortable for introverts. It’s the only way you can find the results you want.
I think the trick is really that you need to A) notice if you are a person who engages in activities dominated by your own gender or solo activities, B) figure out how to broaden your horizons without whiteknucking it.
I want to stress just how difficult both of these things can be -- especially the second part. It's truly a journey where you end up changing your entire mindset to become a person who is going to make a good partner for another human being. You must not feel pressured to do it, or resentful that you are doing it. You must choose wholeheartedly to do it. It's going to feel awkward and strange along the way.
My comment doesn't mean "don't try new things" at all. Absolutely try them and see if you like them or not. What I'm saying is that whatever things you're doing, you shouldn't be doing just to meet women.
Women can tell when guys are doing that, and it's generally off-putting.
Clearly the activities they enjoy do not involve meeting women. For me, this translates to weight lifting (few women lift; if there are women, there is a trope for creepy gym guy and there isn’t much socialization outside of the men’s locker room) or coding (another solo experience).
Try new things. Try things that are social and are uncomfortable for introverts. It’s the only way you can find the results you want.