I was a bit hesitant to post my thoughts in this thread but screw it why not. Like others have said, I do not believe Magnezone/ Magnet Pull should be banned. First, someone made a great point that in the 10 years since BW that we've had zone, it hasn't been shown to be problematic, especially during times where it had stuff like HP Fire making it a better trapper than it is now, so idk it might just be me but if this mechanic is really "that broken" I think it would've been tackled earlier. But anyway that's besides the main point. The big idea comes down to this: near universal trapping versus specific ones. We don't need to follow any consistency since these 2 are vastly different. The reason Arena Trap was banned was because dugtrio had a wider range of targets to trap and invalidated any Pokemon that was slower and could be trapped by it. Its the reason we saw toxtricity, a Pokemon that destroyed the common core of corv/clef/toad/rotom heat/ at the time, fall to UU. Zone traps 3 pokemon reliably with its main set, being skarm, corv, and ferro. It doesn't warp teambuilding and hasn't invalidated any of them, with all being amazing picks in the OU meta with even 2 of them being A+ on the viability rankings. On the other hand, something like dugtrio had PLENTY of targets to choose from, including but not limited to terrakion, toxapex, tyranitar, excadrill, cinderace, toxtricity, melmetal, bisharp, jirachi, clefable, kyurem, and cinderace. This is quite literally 4 TIMES the amount of stuff zone traps and could remove. The big thing is this- the reason dugtrio was a problem and zone isn't is that duggy can trap nearly everything and remove it, while also causing the stuff it could trap to significantly drop in usage and even drop to a lower tier. Zone doesn't do that, it doesn't restrict building and only traps a select few Pokemon. I'd argue zone is a healthy presence in fact, it adds a bit of strategy so I cant just blindly through out skarm onto rilla and have to play smart with it so i dont risk getting trapped.
It really comes down to this idea- do we want to ban trapping as a whole or look at it down to the specifics since its very different. Duggy restricted teambuilding to mons that didn't get affected by it trapping and could trap a wider range of targets. Zone can only trap 3 Pokemon reliably with its iron defense set, with corv having the ability to speed creep and not be compromised as a wall as much, not to mention it doesn't restrict teambuilding to where anything that gets trapped by it gets seldom use. There was a reason zone fell to RU from UU, its near useless if it cant trap anything due to the limited range of its targets. Zone trapping 3 pokemon doesn't make it uncompetitive, we need to stop looking at consistency and look at zone in a vacuum. If your line of defense solely skarm or corv to keep your team being 6-0d by rillaboom, I hate to say it but you've built a shitty team and the problem is you not zone. Its also quite hard to use zone due to its weakness against common types like ground, fighting, and fire while having low speed. Yeah you can argue dugtrio is frail, but equipped with a choice band its more than enough to trap and remove some key Pokemon. Zone also ends up being deadweight at times in matchups without the steels it traps while duggy could almost always put in work due to all the different things it could trap. All in all magnet pull isnt a problem. The big issue with dugtrio was not how it could trap and remove things, but it was HOW MUCH OF THE META IT COULD TRAP AND REMOVE. It trapped far more things than zone ever will and invalidated pokemon. zone doesn't restrict teambuilding, zone doesn't invalidate anything, zone barely traps shit, in my eyes and the eyes of many other players zone/magnet pull isn't broken.