I can't think of a Plug-In someone was using that interfered with my own, personal, game experience. I can, however; think of plug-ins that make some encounters possible to do - for the sake of my color blindness - without needing someone to verbally guide my movement.

Which, my point is: who cares if people use plug-ins to make their UI look more readable to them? Why does it matter if someone who has the world's worst ping is using a plug-in to play their character as if it was on 40 ping? Who does it affect for someone to be using Cactbot callouts to help them through a fight? What does it matter if someone has the timeline on their game screen, vs. a second monitor? Why does anyone actually care that some nobody is parsing their dungeon run, when literally no one but that one weirdo actually cares about dungeon performance? Why should we ban a slew of plug-in usage that can actually help people with disabilities play more smoothly? Why should they have to wait for SE to care, when it's pretty clear SE would rather not care for as long as possible? What about people with much more niche disabilities that a company isn't going to provide accessibility options for? Why shouldn't they be allowed to utilize plug-ins that help them gain the same experience from the game as... me?

There's already separate outlines for actual cheating, character automation et al. I'm sorry to say, but I don't see the value in banning everything from the community when there's so many things that genuinely are helpful to people and give them better experiences. If anything, it just hurts the community overall and enables brigading over incredibly stupid, innocuous things.

The predominant pitfall of addons in WoW had to do with raids and PvE experiences being designed around them, which in turn made them feel required to participate in the content past a certain point. SE can just... y'know... not... do that? And continue designing fights as if Cactbot doesn't exist? I don't think that's... a stretch?