"Existential crisis"? SMH man.
Look, I can understand that for many healers, it is currently in a state that makes it difficult to enjoy. But when terms like this is just thrown out there, it becomes very easy to see that the problem is not just with healer design. It's also with the healers themselves.
I can't and won't try to speak for things on a savage level. I can only speak as a player who has used all four healers up to Barb EX, and what they are going through isn't an existential crisis. On the contrary, they have plenty to do, and there are numerous ways for them to deploy their kits to handle the situations within these duties. Each of them also have varied ways to handle a situation that give them slight edges over the other healers and feeling of uniqueness.
I will repeat that this does not mean that there are not issues with healing. There definitely are. Lack of offensive skills if probably the furthest on the list of these to the devs though. Trust me, I know because of my hotbar setup for each healer has at the bare minimum five offensive skills. Some skills such a Pneuma, Assize, and Macrocosmos, I feel are well designed because of their duality, which gives them both optimal and suboptimal applications of these skills that change depending on a ST vs AoE scenario. Even a skill like SGE's Phelgma can have you reserve or spend charges depending on what's going on. So it's not like these thought processes while healing don't exist. Players just say they don't, which is a blatant lie.
As usual, I default to if you want more DPS options, play a DPS job.