I’ve seen that graph too, and it makes sense.
Men are designed to be most attracted to healthy, fit women who have their best fertile years ahead of them. This means early 20s.
Women are designed to be attracted to men of demonstrated ability and status, attributes which are most visible as men enter their 30s.
Also, as you start looking at older age groups, there are fewer unattached older men for the available older women...the good ones have been taken by the more perceptive women.
Another factor is - divorced men tend to remarry. Divorced women, not so much.
I was going to make a comment about Marilyn Monroe - she was a sweetheart when the cameras were on and a b**** when they were off - so I’ve heard. A woman challenged me on this and I had to admit I didn’t know if the 3 divorces were all her fault or not.