You raise an excellent point, Jimmy! Although, I would argue that strapping on a kilt doesn't really take any more time than buttoning a pair of trousers (well, okay, maybe 5 more seconds). And actually, it would be easier to put on a kilt in certain cases when you're rushed and panicked, rather than trying to get your legs into your trousers.

Of course, it's different if you're stopping to put on kilt belt, sporran, hose, garters/flashes, sgian dubh, tie, waistcoat, bonnet, and all the other stuff. That's the part that takes a lot longer than trousers. But in the scenario of a fire, just wrapping the kilt around you and buckling it isn't really any more time consuming than getting your trousers on.

And besides, nobody would lament losing a pair of trousers in a hotel fire, but if you left your kilt in the room, you'd be sorry!