Tanks are still taking STR accessories.

[Deceptus]

:|

Healers still have dps skills. Tanks still do damage. There's no penalty for doing damage on either Job. You're still encouraged to do it to clear content early - this was even stated in the Live Letters. Those who want to push the new raid tier week 1 will do so by getting crafted gear and leaning on tank and healer dps, which they did, and continue to do.

Going back a bit but Healers have dps skills because you can't kill mobs in solo content, leveling, with Cure and Physic. It's the same reason Cleric Stance exists.