You will see for yourself the answer that you seek if you only looked back, just a peek. The arrow in my quotes will lead you to the page. Look for my name, and enter the stage.
Ah ok I looked. I don't really see how you can compare those other mons to HoopaU. Having a comparable attacking power is just one of many factors. This mindset ignores all the points that have been made in this thread in favor of ban, most notably that other seemingly OP pokemon have flaws which can be exploited by a myriad of pokemon, and don't require ppl to waste a team slot JUST to handle Hoopa-U. Yes, U-Turn beats it, but guess what? Not everyone wants to play an offensive team or pack a lando. And the ability to not do so is what defines a de-centralized meta.
To the point of the pathetic and/or irrelevant mons, here's just some examples with very common pokemon, there are multiple other answers to each of these though:
Ramparados - Hippo can eat 2 banded superpowers or rock slides and OHKO with EQ
Chandelure - Chansey
Haxo - Metagross can come in on the outrage plus he's locked and will get confused, flyers can avoid the EQ, basically there are options for each of his moves and all that's required is prediction.
Azumaril - Scolipede can come in on the superpower and OHKO with poison jab
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Hoopa-U - [insert pokemon here] eats > 50% on the switch. Unless you can OHKO in return, you're dead.
It seems (and I'm not saying this is you, the person I quoted, and also this paragraph is v much opinion and personal experience to be taken anecdotally) that the same people who don't want a ban on hoopa-u
do want a ban on scald (ridiculous, but that's another thread...). Which suggests the vote is being cast not for the good of a diverse, healthy metagame as a whole, but to benefit a specific playstyle (HO), and possibly in fear/hate of another (stall) which is challenging enough to play in the current meta without HoopaU. This manifests itself on the ladder in that half the HO teams I play forfeit if they take a burn or lose a mon in the first 2-3 turns. Pokemon, like most things, is more fun when there's more options in both playstyles and pokemon. I get excited when I see a team preview with one or two mons that I very rarely come up against. What will they do? Did the player find some cool moveset and strategy I'm gonna have to work around? I have no hate for HO, or any playstyle. If I have to find a way to get around stall with my balanced squad, I will. Or I'll lose. That's how the game goes. And there are ways to work around stall, or HO, or any playstyle, with any playstyle.
Perhaps this is where I differ from players like lolnopound. While I do play pokemon with the intention of winning, the actual reason I play is to have fun. To come up against combos and stuff I haven't faced before. To be
required to strategize. Not to get in there and mindlessly spam stabs off an unboosted 439 SpAtk for easy kills, with the goal of ending every game by turn 12.