Secondly, if such variants as the Utilikilt are accepted, are there any grounds for not accepting the Pringle variants?
Utilikilts are made by people who actually wear them. I doubt that these designers would be caught dead wearing most of the stuff they put in these fashion shows.

These fashionistas don't have a clue about how men actually wear kilts.

I think that why the kilt movement will remain a word-of-mouth movement for a long time.

Unlike most fashion movements, the "experts" can't seem to get their hands around this one.