So why can't I skin mobs with your skinner's skill? We can just imagine it as being me "asking for pointers and you showing me how it's done." And then I get the leather.
Why can't I go and start crafting potions with your alchemist's skill, complete with procs for whatever spec you are?
Why is Enchanting the only profession that gets to be gang-banged by the rest of the group with no compensation for the Enchanter?