In many threads on this sub, many men claim that women being picky would lead to really serious social problems. Many even suggest that because women are so picky that fertility rate would drop and there would be societal collapse.

To me this sounds very alarmist, but do you think this is true? Wouldn't lower fertility rate be better because it reduces congestion and traffic, improves housing affordability, helps the environment etc?

Also would men also be responsible? E.g. if a man is picky (e.g. if he is a womanizer) then he would contribute to lowering fertility rate as well.