You DO know that joining a roc strike at the very end of the boss fight or having a 0.13 kd on the losing team in crucible can give you that shit too? On your first few days, even. What devalues the rng items isn't xur. Hes just another rng. What devalues them is that they are rng. Unlike the exotic bounties, or specific boss drops. Those are not being devalued though.