I disagree - entirely removing sleep would actually make the game better imo. There isn't any upside preserving sleep - hypnosis nonsense are still often interactions where whatever happen is out of the control of both players, which is the paper book definition of an uncompetitive element. Even if you go from the assumption that sleep in its current state is not broken, you still would improve the game by banning sleep moves over keeping sleep clause. To me that's a very pragmatic reasoning on you'd want to remove the current sleep clause. I'd go further saying than wanting to keep sleep clause, despite the fact that you can improve it to actually make the tier better and match in-game mechanics - which is what a simulator is supposed to do, even though National Dex is a metagame trying to predict how the game would be without the dexit rather than a replica -, goes from dogmatic motivations.Removing sleep clause would just be making the game worse for weird pointless dogmatic reasons. Who cares if it's technically a mod, it's good because it makes the game better. I really don't have anything else to say about this part tbh
Something less tiering minded is that National Dex formats would look stupid if they decide to keep Sleep Clause while the rest of the website removes it - sleep clause has been outdated and archaic for a while, and it is time to finally get rid of it.
It is completely true that randomness is part of the game. In fact, it is even something explicitly stated in the official tiering policy framework. Does this mean we have to accept every random element as "part of the game", and thus not removing it? Of course not ; you lose nothing worthwhile by removing stuff like evasion, ohko moves, bright powder and kings rocks. Of course you would impact some "legit" super niche sleep users like Amoonguss or sleep powder Tangrowth by banning sleep (honestly I always thought sleep moves were overrated on these but that's an other topic), but I honestly gladly would send hundreds of mushroom to hell if that means we can get rid of a mod that should have never been implemented in modern generations in the first place.Assuming sleep clause stays, there's really no basis for banning sleep due to it being overpowered (I don't think anyone was actually arguing this though, I'm just covering the possible reasons), so the only real reason I can see to consider banning it is if you think it is uncompetitive due to the randomness
Moves like spore and yawn aren't really any more random than other game mechanics like paralysis or move accuracy or critical hits, but the low accuracy of hypnosis combined with the random length of sleep does mean that games where hypnosis is used are influenced by rng more than usual
Personally I think that it isn't that big of a deal because this game already has a ton of randomness in it, so no action on sleep is necessary. But I could understand banning just hypnosis (and maybe dark void too ig) if you're concerned about them being uncompetitive
This is not an argument to ban every form of rng from the game, as each case should be looked at individually : if you ask my opinion right now, I'd for example still keep paralysis, freeze or focus blast in the game for a number of reasons I won't devolve into in this post, despite them having some kind of rng factor. However if you can remove an rng element from the game with little to no cost, and without implementing a mod, be my guest!