I see both sides of the battles. I have four sisters, have two daughters, and there are lots of females in both sides of the family. When I say women are the weaker sex, I'm talking about brute strength, upper body strength, heavy lifting etc. Much easier for the guy to do the heavy lifting while many women often can't. I've been in jobs where the women demand the same pay as me, but want me to pick up and install stuff that is supposed to be part of the job duties but they can't or won't - not fair to me.
On the other hand, I see a lot of lazy good-for-nothing guys in the younger generations where the women are smarter and work harder. Both my daughters make real good pay, several times what their men make. They can afford to pick up the check and often do.
Of course, a bigger, stronger person should do the heavy jobs. And the tougher of the two should protect the tenderer! I agree with you. It’s nature.