In the vast majority of duties BLM actually self-heals more than RDM vis à vis Manaward, because RDMs don't cast Vercure except as a downtime Swiftcast in party duties.

And while some RDMs might lean on Vercure in solo content, solo MSQ duties are meant to be clearable by any job, and can be cleared without a single self-heal regardless of the job you're playing if you just read all the telegraphs, mechanical cues, and NPC statements in combat correctly.