If you had read my whole post (This I'm more understanding over though as I didn't reiterate it several times like the others) I said the option should be a thing once people hit the soft cap. IE Forsaken how it was, 500 I think? If you don't know what a soft cap is that's okay, it's the point in the game where blues stop dropping (engrams) at higher light then your current gear, which then makes them useless.
Make it like D1 with greens. They're irrelevant at your level? Auto-dismantle.