Yeah. Attractive people are fairly consistently approached or hit on or treated differently or what have you every day in real life. Remove the approach anxiety that the other 90% who DON'T approach these people but want to by creating an easy forum for approach, and you have an overwhelming amount of messaging. I don't blame girls for being quickly disillusioned. Even as a guy, I feel like the pickings are slim, and I'd much rather date a friend than meet someone through OkC.
It is easy for the attractive to say that; like most traits, people don't like to believe dumb luck helped them. It makes a much better personal narrative if it was their own hard work. That doesn't mean it's backed up by any fact.