I mean, there isn't a valid reason MCH shouldn't be doing more damage than BRD or DNC and I'm speaking of rDPS. A High APM job with less mobility than its counterparts and little to no utility to speak of should absolutely bring the highest damage of their role because that's all it offers. "But what's the point of BRD and DNC then?" The Increased Healing from Nature's Minne, Improv, Curing Waltz, etc. the utility in Songs and Steps and the extra mobility granted by Repelling Shot and En Avant. It's legitimately the same exact argument for why it's alright for BLM to out DPS RDM and SMN; extra healing, utility and mobility.

There's simply no reason whatsoever for MCH to be so low when everything points in the opposite direction.