Why is it...

[Alan H]

I can just see it now...

"Moooooommm.... PLEASE get me a Spongebob kilt!"

YES!!!

Spongebob Squarekilt!!!!

[jfellrath]

...that I've never personally seen anybody wearing kilt around except at an "Enter The Haggis" concert?

Depends on where you live. In most places I've been, kilts are either considered costumes or special-occasion wear only. That goes for traditional and contemporary kilts.

...that no major fashion designer has picked up on what could be a goldmine? (Not that I would ever buy a Tommy Hilfiger Kilt)

I don't think it's the goldmine you think it would be. As noted above, it's been tried and hasn't worked out, despite the fact that almost everyone who has worn one agrees that it's more comfortable.

...that even bright intelligent educated people insist on calling it a skirt?

Because they think they're being cute, while trying to hide the fact that they're threatened by our ability to wear what we want and not care about other people's opinions. At least that's my opinion. There are probably a few who don't know what a kilt is, too - as odd as it seems, people can be totally oblivious to things right in front of their faces.

...that Utitlikilt or some other company hasn't aggressively sought after some major celebrity to wear their kilts?

Utilikilt doesn't like to work that way. I don't think MOST kilt companies like to work that way, actually. The kilt is a garment that is treated with respect and honor (until dorks like Axl Rose throw one on, that is). And trying to use celebrities to promote a garment style that is older than pants goes against the principles of many kilt makers.