Male hypergamy and polygyny has been practiced by many cultures historically. They had many problems, but low birth rates wasn’t among them. I don’t think dating apps are a sufficient causal explanation alone for low birth rates
Could you? Are you part of the 1%?
* Feminism,
* Decline of religion,
* Rise of state and law, particularly around male responsibilities towards children,
* Effective contraception,
* Dating apps.
Take all of this together and we're basically reverting back to our natural polygamy, but without all the pregnancies.
Historically they were compelled
However, I'm surprised nobody has bought up porn yet (and other equally addicting digital habits).