Because your qualities of "providing, loyal loving" are fine if you find a woman who ....
1. Is attractive...imagine a guy providing for an ugly woman. Don't want to disparage ugly women but it just isn't our natural state to work for someone who isn't providing beauty.
2. She didn't get baggage from other men. We all know men are pigs at times. Providing for damaged goods.....why do it?
The deal you propose worked for the past. But are you saying that a man should work hard and provide financial security for a woman that enjoyed her young days with casual sex while the guy worked on his career?