you're entitled to it, but relying on the evidence I seen in this thread and my own experience of the game, I'm not convinced myself.
Another thing most don't consider is that Square has a lot of data on our gameplay habits.
They probably have a very different perspective when they look at that ?
So I tend to trust them more than a player who tells me "look, these top20 dudes cleared ex2 without heals, healers useless". :P