It's the job of the devs to balance the healing classes. Jobs are defined by their dps, healing, mitigation, mobility, buffs etc. BLM lacks a lot of what other casters offer because in exchange it gets high DPS. I'm not saying to make WHM a BLM but imo devs need to look at healers from this perspective as well as perhaps a more engaging gameplay loop for WHM if it's going to be the straightforward strong healing class. The downside of wanting diverse gameplay styles is that some class in every role has to be super accessible bc you have to leave something for the casual and or inexperienced player.

What we have currently is that devs want every job to be for the casual and inexperienced player so there's no barrier to entry for anything and I just think that's the wrong philosophy, to be completely honest. It's like not having small, medium and large options for clothing and just making everything small.