I don’t think it’s as much about social dynamics, but more for practical reasons. Once you’ve spent a good amount of time here, you’ve likely already curated a good follow list that’s decent enough to sustain your swiping needs on a daily basis. It’s not perfect but the marginal utility of following more people is lower. You’ll go out of your way for a really interesting person but otherwise it’s unnecessary.
I don’t blame anyone. It’s just how it is.