I don't think it's kindergarten level to have questions around who these events are tailored to. If the expected level of participation for top tier is botting/no sleep, and if that is what staff is expecting by their own level of engagement or ability, then casual play is potentially more stressful than not taking part at all (and hiding the leaderboard isn't going to change that, just remove transparency). And that is certainly a determination people will need to make for themselves, but bringing it up in so many words is useful to that end.