This is what always frustrates me when people complain about GIMP’s UI!
The common opinion is to “make it more like Photoshop”, but Photoshop is absolutely not beginner friendly - most of those people are just familiar with it already.
I remember being completely lost and constantly getting annoyed when I first started using Photoshop.
The main reason “dieting” doesn’t work is because people think it’s a temporary change rather than a lifelong change.
(You did address this, but it was quite far down, so I wanted to point it out more clearly.)