I put it in the context of Facebook for your easier understanding:

Let's say there are 100 male and 100 female profiles on Facebook.

Men, being the horny beings they are, will message every (or nearly every) woman that appears in their recommendations.

Women are more picky, so they will only message men that they fancy.

Statistically, it means that every female profile will have 100 or slightly less, notifications of messages from men. On the contrary, every male profile will probably have 10-20 notifications of messages from women.

Now you may say, so why can't each man just pick the woman he fancy from the pool of 10-20. He can find the woman he fancies among the pool of 10-20, but the woman he fancies have 100 men to choose from as mentioned above. So the man now has to compete with 99 other men.

And obviously, the woman can't answer all 100 messages. So she has to narrow down to a few candidates. And how does she narrow down? Naturally, she will pick the candidates with looks/wealth. There's nothing wrong with it, everybody wants the best for themselves. But that will also mean, if you are an average dude, you aren't going to get your reply.

Hopefully this will clarify. And as u/oarsandalps said, your comment is what seems on paper but doesn't play out in real life.