Funny, I seem to recall being stuck healing 4-5 DD parties in Dynamis. The alternatives were playing Refresh monkey to BLMs (who were better at the crowd control game with 2 sleepgas) or tossing out refreshes to the PLD tanks while keeping an eye on our puller. This didn't differ much when fighting kings or doing Einherjar when it eventually came out. Unless there's some super secret serious endgame out there that I didn't know about.

Personally, I have no doubts WHM was the better healer, especially when it came to recovering from AoEs. That didn't stop people from having tunnel vision and thinking a job who does one thing elsewhere (like maintain a merit party) can do the same everywhere else. In some respects, WHM was just overkill for certain events.

Enfeebling then and now isn't a particularly involving aspect to deter people from making us healers, either. With most encounters being 1 vs Many, it's land what we can then most likely do the pink mage bit in between reapplications. It's partly why I've wanted to see a lot of our debuffs get the Step treatment and have levels applied to their potency. Land a near 40% Slow II? That's it until it wears. But what if you or other people can cast other slows on top, adding x% per land in a meaningful number with a bit more duration? Maybe then we'd be getting closer to enfeebling being a full-time gig, but we arguably need more enfeebles than what we have now, and not just tier-ups.