Like the only reasons you can come up with is mystery chemicals or soyboys - seriously?
I think it’s vastly more complex than “insert my favourite political reason” and includes many different factors.
Personally I think it’s telling that only the Orthodox Jews don’t seem to have that problem - with an extremely rigid, strict and misogynistic religion as their primary purpose.
Personally as a male I don’t mind having kids but if I were a woman no way in hell would I have one.