And how many times have you seen Druids use Healing Touch on minions? Not often. That is the closest comparison. Gavin's point was that 95 times out of 100, you are going to be using it to heal yourself, and thus, it isn't better than Healbot. It's a bonus that it can target minions, but not that big of a bonus, considering the usefulness of wasting a card to heal a minion, particularly with things like Ancestral Taunt/Reincarnate.
And if people think making a high cost deck around Joust so that you can run x2 copy of this and heal for 14 will be viable, I dunno. There are other classes that can heal for way, way more and we don't really see that as a viable strategy, do we? I guess Crusher Shaman is different, but I can't see finding space for this in Crusher, but who knows. I am just salty that it's RNG.