I don’t care about addons. .. but then i played WoW for a long time so might be biased..

How someone decides to arrange their ui or view their ui should not effect anything or anyone really.. some peoples brains process things differently so sometimes having a ui look one way or another is beneficial to some and not others. This kind of thing shouldn’t bother others.. you don’t have to use it..

As far as addons that automate in a way that it creates an unfair advantage to others.. then yes perhaps those are bad.

Addons that are help with boss fights i think maybe is a gray area.. Some people with learning difficulties can use this tool to help remember and notice things more. While others who are more normal perhaps it might create an advantage.. i think though that if people use these addons they then should probably not complain about fights being too easy.. (this kind of happened in WoW). These could be a double edged sword unfortunately..