Basically you only use a Tourniquet on a hemmorhage/bleeding that you can't stop.
However, on medium sized bleedings, you need to use a bandage and apply a lot of preassure (for example you do the knot on top of the wound). Wouldn't it make sense to put a cat tourniquet over that spot, and tighten it only a bit (but not all the way), to add some extra pressure?
Normally you would first put down a layer of gauze-bandage, before covering the wound up with a cover-bandage. Wouldn't it make sense to do this with a SWAT-T (Tourniquet) instead? To add some extra pressure, when covering it?