Japan has an average IQ of 106, I'm sure a fair portion of that 40% isn't exactly 'low quality' in terms of genetics.

Dating apps are also mostly about photos.

Yea but those men with 106 IQ on average lose out to men with 120 IQ and good looking on dating apps, right?

And the vast majority of those 106 IQ men can't move somewhere else where their IQ advantage comes into play. Passport bros are a thing but they're a very small (but growing) part of the male population.