You can deny it all you want but there
is a grey area due to SE not taking a draconian stance with their ToS. Trying to argue hair and body mods are remotely comparable to Cactbot is laughable.
Furthermore, you specifically asked why SE would continue developing hard content when AM exists. That's a wholly different argument than "every plugin ever is ChEaTiNG OMG!!!!!" One actually provides a gameplay advantage whereas the other makes your character have bigger boobs. I mean... I guess that's some kind of advantage
It's not bait to acknowledge that installing DRM will have a heavily negative impact due to how prevalent third party has become. You can lump them altogether if you fancy, that doesn't change anything i said above.
Because like I said above, the amount of people actually using those specific plugins isn't significant compared to everyone else doing the content without them. Both you and Azure are mischaracterizing Yoshida's comment. His response about not making difficult content was towards a zoom hack not hair mods.