At 24, they concentrate on attracting, not "Mr. Right" but "Mr. Right NOW!" (like in the men's bathroom of the nightclub)
By the time they're 34, they look for Mr. Right, but her tastes and expectations have changed because she is jaded, and she no longer can muster attraction to or for most of the remaining unmarried males.
At 24, they are chasing the limited number of “alpha males”, the guys in the top 5-10% of desirability, heedless of the fact that each woman has several other women competing with her for his attention.
For the alpha males it’s great. They can get a woman who is going to try very hard to please him, then dump her when she starts making insistent noises about commitment, moving on to the next.
Meanwhile, women are spending their youth on men who are never going to commit, and winding up in their 30s bitter, cynical, and with few good prospects.