First about the peeing, actually it is rather convenient to lift a skirt, in fact I find just as convenient if not more convenient then unzipping a fly. I will give you changing to get a hitch is a bit of a hassle, but if you consider that that is only a small amount of the time while you are hiking, and that most hikers carry at least some form of a change of garment anyway, it is not all that bad.
And no, not all men wearing skirts are trying to make a statement, some of us just realize it is comfortable and to hell with anyone who will judge us based on what we are wearing.