Yeah I mean obviously visually there are "leagues" whether you want to admit it or not, youve definitely seen a couple where you're like "woah she's will him? She's smokin" or "woah he's with her, she's such a nerd." I don't necessarily think it's right but as humans I don't think it's possible not to have this in our society
No because limiting yourself with leagues will get you no where in life. You are already losing a battle when you think someone is out of your league. It's like losing without even ever playing the game.