Yes，part of the explanation is probably that women mature a bit earlier than men (in terms of romantic and sexual attractivity).
But I think that what makes the situation very sad is that our western society has decided to close its eyes to the intrinsic value of women's virtue in the eyes of men. When a young man can't find an interested partner during his younger years and then he is supposed to either fall back on the women over 30 who are left or play on his newly acquired skills as a thirty year old to seduce a woman 10 years younger. In the end, everyone is sad, there are fewer children, society is less virtuous, women change partners throughout their lives, while men wonder if there is any marryable woman left around them.
You didn't read the article. You didn't read the thing you wrote that supports the evidence I'm the article. You don't see how you basically just said you were forced to date 20 year olds in your 30s because women your own age are... what? Something bad or something?
I can see how it one squints, you could get that as what I'm saying but that's not it. My point is that the "men mature slowly" argument is dumb. There's plenty of evidence to support the idea that women's standards are increasing and men are not improving. Men are alone because we've decided that that the world is the problem, not us and that's unfair.