This reads as "because I can do my job with it, it should be good enough for anyone". Making band posters is not really the same as being a professional creative using it all day long. It has not been adopted among those people, while Blender has. The reason is almost certainly because its UI sucks, not because it's "different".

Lack of features more likely IMO.

I never said that GIMP is better or more useful than blender or krita or photoshop, only that I am better with it, that it can do all of the photo and image editing I need, and that I think the UI is most of the problem for the people who dislike it.

I'm not punching at all.