If he's in blues, he's shouldn't have the ilvl to queue for LFR. Enchanting and gemming isn't expensive -- I don't go out of my way to make gold and I've managed to maintain enchants and gems on every piece of new gear I've gotten on my main and my alt for the entire expansion. Your excuse is just that, an excuse. A bad excuse.
I agree that his delivery was wrong, but his point was 100% spot on. If someone is doing less DPS in ToT LFR than I was doing at level 85 (or even when I started level 90 heroics at the start of the expansion), then that's a problem that they need to fix before they queue for ToT.