FF14's raiding is just a puzzle to be figured out as a group. After that, it gravely lacks in complexity. A big part of that is because of the way healers are designed. Spot healing is entirely tied to cooldowns, AoE healing requires negative IQ and teamwork, there's no resource building, cooldown management is super stale due to the way fights are designed to always do the exact same thing at the exact same time.

In other words, FF14 is difficult blind. Once you've mapped out the fight, the challenge is gone. Actual execution - especially as healer - is incredibly simple, even in Ultimate.

If you want more engaging content as a healer, go play WoW, as it does actually require more engaging healing in addition to a (slightly) more engaging dps rotation. Or raid in FF14 with people who get hit by avoidable damage in content where it doesn't just outright kill you. Though most of it is designed so that healers can't actually make up for people's mistakes, due to the nature of Vulnerability - probably one of the worst design choices ever. Thankfully one they seem to steer away from in favor of Damage Down lately, so healers CAN make up for mistakes.. up until hitting enrage, anyhow.