I wouldn't be bothered by the DPS if MCH had utility to compensate for it.
Yet, it's under BRD who provided good utility and niche utility and far under DNC who provides massive, all rounder utility that can be equal to a Cure III every 60s and a 5% HP barrier every 120s.

These strong utility can lead to an increase of Healer DPS.

I just want to play MCH and not feel like I'm griefing my team for it.

RDM is also in a terrible spot, it has amazing utility but the more DPS you need, the less usefull its utility is. If you want DPS, you'll never res or use VerCure. It's a good thing RDM has Magick Barrier and Addle, but the job is, ironically, the least mobile of all casters.