Believe me I have had so many explanations from so many different trainers (some of them internationally acknowleged) who know a lot about karate / katas and they are very similar. I have a hard time believing I have missed a point here. But if I had gone on this way for 20 more years I would certainly have brainwashed myself into believing it.
I haven't read all of your posts on this thread, so there's a possiblity I'm misunderstanding your point. If so, please correct me.
Your discussion of kata seems to center around it being about the appearance of it, rather than it having any utility. My primary style (Nihon Goshin Aikido) traditionally only had 2-man kata (similar to what you'd hear some call "one-steps" in other styles). They are used for teaching the basic principles and fundamental techniques. I added a series of "long" kata (very short by most styles' POV - around 10 moves in each), to give students a way to work on movement, balance, and transitions by themselves - while keeping their mental focus on the fundamental techniques.
Can they be done for aesthetic reasons? I suppose so. And sometimes I like to try to do them as cleanly as possible, focusing on the individual movements, rather than the technique. That practice has purpose, as well, though - it requires more precision and focus on body position, which is useful in and of itself.
I don't like to spend a lot of time on forms. When I was teaching, I spent less time on the classical (2-man) forms than most NGA instructors. In fact, the time my students spent on those and the long forms, combined, was probably still significantly less than the time most students of the art spend on forms, as I have a different view of those classical forms than many instructors do.
My discussions with folks from other arts - both here and elsewhere - leads me to believe there are a lot of ways kata can be used, without it having to be the focus of training in a way that is detrimental. I think a part of the issue is how folks perceive and experience that type of training. Some folks simply don't enjoy the repetition of it. I've hears some on here belittle that view, and I disagree. Brains are different, and some brains don't do as well on that type of practice as others do. On the other hand, some brains seem to do extraordinarily well with the moving meditiation that kata can present. For me, as I've matured (both personally and in the martial arts), my ability to learn from forms has improved. Early on, all I seemed to learn was movement patterns. Now, I find them a useful way to explore those movements, to see what happens when small changes are made (both in solo forms and 2-man forms).
Perhaps forms simply aren't a good fit for you. Or perhaps you've never had an instructor who gave you a good way to use them that worked for you.
That said, I also think there are places that have made forms the centerpoint of their art, and I don't think that's particularly useful, except for those folks who just really enjoy doing forms for the sake of doing forms.