If men’s peak is in their 30s and women’s peak is in their 20s, why aren’t most women in their 20s with men in their 30s?

If we men peak in our 30s and women peak in their 20s due to fertility reasons, why are most women in their 20s not dating/marrying men in their 30s? I just joined Redpill and this is a really popular opinion. But no one is asking this question and it’s bothering me.

If men’s peak is in their 30s and women’s peak is in their 20s, why aren’t most women in their 20s with men in their 30s?
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