Women don't work as much as men do. Men have built the whole civilization, men also work the most dangerous and dirty jobs.
Women have periods every month for more than 40 years of their lives, which makes them weaker. While men don't have any periods. Women can get pregnant from sex but men can't. And the pregnancy is a hella big deal, women become weaker than they already are and their bodies undergo through so many changes during pregnancy. Men can't get pregnant, they don't have to bear anything.
Why are women so dependant on men?
Having a male body is more beneficial.