Perhaps I'm wrong, but I have to assume that you say this from a perspective of someone who doesn't generally play orcs. Just like any other prep, there are efforts required to obtain them, and effort needed to use it.

Admittedly, orcs don't have the biggest sacrifice in doing so, but think of elf-skins like the orc's sleek black wand.

Also don't forget, orcs have some of the biggest HP pools in the game, and they burn through all of it (and more). Just think, the day an orc learns to tank w/ something other than his face THEN you're gonna have to worry!