There is much truth in what you’ve written.
Yes, there is a lot of truth in that.
However, women have always had to step up and many, many children were raised by mom only before 1972. I think it’s more than that.
I think it is also related to unrealistic expectations. IF you get married, he is supposed to be perfect (and, of course he never is). Women used to be smart enough to know that nobody is perfect, and were willing to accept men for what they were (and themselves as equally imperfect humans).