The real concern seems to be that they are afraid those who are uneducated will make a decision like "Why should I spend hundreds of dollars or pounds on one when I can get something just as good for so much less."

We here on this forum know about the different qualities of kilts, but your average tourist does not. Sure, if they saw them side by side, they could probably tell the difference, but they are probably not going to see them that way.

The best way would be to regulate against misleading labels like "Designed in Scotland" or "Authentic Woven Tartan" and other meaningless labels.