It's not just GT Greg.

There were no kilts being worn when I visited St Kilda (Nicholsons) in the Canongate and nor have I seen them in Anderson Kilts in Dumfries. Nor at Celtic Craft Centre though I never saw any male staff there to begin with.

I have seen them worn at Highland House of Fraser in Inverness, a shop that was once run by Hector Russell. At least it look like HR are back now in Inverness though as well.

Of course it is down to the owner how they play it but I might feel less sympathy than I would otherwise do when they complain that things are going wrong and have not tried to show their pride in their products by having staff model them.