Because I don't believe that anyone should be able to craft/buy their way to epic gear. The way it currently is, if a NM drops a mat then it can be sold to a crafter, and the crafter can either craft the epic gear for themsleves or sell it. Either way niether the crafter in question nor the noob that bought it from them deserve to have it because they didn't defeat the challenge necessary to earn it. Now maybe if mats dropped off NMs were bind on pick up and the only thing a crafter could do is craft the gear for themselves, then I could be ok with it. They earned it, they crafted it, and it was not sold to some noob that doesnt deserve it. I also dont mind gear that needs to be upgraded with mats, but I'd like it Limbus style: take the mat and the gear and trade it to an NPC to get it upgraded. I wouldn't trust a crafter with my epic loot if my life depended on it. For them it would be all about money, and it wouldn't matter to them if the synth failed.