/sigh
And this is the kind of nonsense hyperbole elitism that ruins everything.
From the fights I've done, Tanking requires both less skill and less stress than Healing does. Especially on WAR, but pretty much on GNB, too. Tank rotations aren't that difficult, and generally you aren't watching out for party health - if you are, things have already gone horribly wrong and it's likely about to be a wipe because you aren't a PLD that can Cover the healer while they recover the situation and the Enrage isn't lax enough for that to work into a clear anyway.
WAR is hyper easy, and most bosses require little if any positioning. The only thing for the OT to worry about in P2S is going to the right wall for the blue man mechanics and taking the tether away from the party. The MT grabs the boss and just...turns it. That's essentially it. Oh, and both use CDs for the double Tank buster. That's really it. Every other mechanic they deal with, all the other players are also dealing with.
P1S has roughly 3 Tank swaps, which can be invulned through. Otherwise, Tank faces the boss north to make your melee's life a little easier and they meet the same mechanic requirements as every other player. ESPECIALLY if using braindead strat for intemp. And if not doing so, only one of them really has to worry about it, and all players, including healers, have to manage their intemp stacks. Healing P1S is more difficult than Tanking P1S is.
This also goes for a lot of the Extremes. Healing ZodEx is more difficult than Tanking it is - the only unique Tank mech there is a single Tank swap that you do, what, three times? And HydEx can be solo Tanked!
While you can argue Tanking is more difficult in some fights than those, Healing is also more difficult in other fights than those.
.
No, healing is not just for lazy/bad/low skilled players to get carries. I'm sorry you feel that way, but that's you being either an elitist, wrong, or both. I've done Healing and then gone to do other, LESS challenging roles like DPS and Tanking and been shocked at how much easier they are getting to play on a lower difficulty than the Healers on the team, who have to be playing on a higher skill level.
EDIT: Typo