What do you mean by win less? If men's champion won his 7 matches all in 3-0, and women's champion won her 7 matches all in 2-1, then what do you mean win less?But why should women get paid the same for having to win less? It's an essential issue of fairness.
It's you and other with the flawed argument about playing more sets and time. Tennis players are not paid by playing more sets, or longer matches. They are paid by winning a match, easy or hard, it doesn't matter. Until you change that fundamentally, your argument about who played more sets with pay is crap.
At least those who argue based on revenue generation have a point one way or the other.