It's true, but a lot of people don't have the opportunity or patience for those other approaches. If they're not just homebody introverts in the first place, they may already have a pretty saturated schedule/network without many suitable people around to pair off with. This happens to a lot of people as college recedes and life establishes a professional, mid-life rhythm.
Dating apps are garbage, but alternatives aren't always practical.
Then they really don't have the time for a relationship. Maybe they just want a hook-up, but that also takes time to connect with people and build relationships for something casual. It's all just work, at the end of the day, and a lot of people are unsatisfied with that answer. Things like being on the high-end of attractiveness are like cheat codes, but those people still have to put in effort to connect with people before they get to the fun part.
I met my wife at a running club. Of my friend group, most met while active in sports or other activities. A few were introduced by common friends on a "you might like so-and-so" basis. And a few met in college. I'm only aware of two couples in my extended friend group who met using dating apps - and both of those were premium subscription models, not freebie Tinder-like apps.
Dating apps strike me as a very low-quality (low fidelity?) way to match couples.