Yes I get your frustration, the same thing is happening across orgs these days as claude and co-work has become widespread.
Wisdom is a thing, so is competence. Humans have it or they don't but machines do not (yet), but the massive capabilities of the tools are also something that can't be ignored.
We can't throw the baby out with the bathwater. It's going to take some cycles of learning the ropes with this technology for humans to understand it better.
I would push back -why couldn't the senior devs communicate these issues to senior management? It sounds like a broken human system not a broken tool or technology. All AI did was shine a light on the human issues on that org.
From past experiences (and I'm sure I'm not alone here), I can almost guarantee that the senior devs did communicate the problems, but they were ignored or brushed aside.
Very seldomly does middle/upper management truly listens to engineers, unless there's buy-in from the CTO/VP to champion the ideas and complaints.