I think I am probably in a minority of those using this site as I am not actually looking for love
I understand your point exactly. Just because we may have dating or long term on our profiles doesn't mean we can or should try and jump into that straightaway, or view people solely as potential mates. But the league thing exists in it's simplest sense (if you agree it exists at all) as something that people judge themselves and others on, usually by physical attractiveness, which I would think we do in real life too. It doesn't mean it's right, though.