You do know that those things you're trying to vilify go hand in hand, right? Standing in the bad stuff as a tank means I'm either going to be dead, near death as a result, or something happens as a result that will make it a lot easier for me to die (see: vulnerability debuffs that can't be removed via Esuna/Leeches/Detriment). It's not just "take damage, get healed" like you're trying to paint it.
Casting heals is only part of what people expect from a healer. Debuff removal and (where applicable) crowd control also come into the mix. Just because SE hasn't done it does not mean it doesn't exist.Healing only is frankly pointless. Your only job is to make sure no one dies. It does not matter what health they are at as long as it's not 0. So then being good at healing beyond "keeping people alive" literally amounts to nothing in the progression of a fight. The boss won't suddenly surrender and submit to your supreme ability to "keep HP bars full". It doesn't make sense from a game or even real life prospective.
This is where you can compensate via gameplay. Not all healers have to play like a WHM or SCH. People who liked to brag about their "skill" hated it, but smart heals would be a good way to draw in people who may find conventional healing more difficult. Or a healer more reliant on keeping HoTs up (think a resto druid) where upkeep of HoTs is supplemented by targeted heals.Increasing the healing intensity without understanding why it's currently low is also another point that needs to be made. There are people of varying skill levels. This is something I've learned as a cold hard fact and is borderline impossible to change. And frankly, with Survival being a constraint that needs to be met, akin to DPS checks, if it's too hard, then you will see success rates of content drop to abysmal levels. Healing downtime is an evil necessity so that even the poorest player has a chance. What you do with your downtime determines how good a player you are.
Except this causes healers to be one way or the other; there's no middle ground because you're terrible if you focus on healing and "good" if you DPS. If your entire argument for Cleric Stance hinges on the idea of doing above X DPS (because even in situations where you can't switch into Cleric Stance, you can still at least put an Aero/AeroII/AeroIII on the mob), then yes, you're focusing on e-peen and not something that is native to healer gameplay.
If you want a healer that deals damage as part of their gameplay, there are venues for that sort of thing. Just be prepared for the problems that come with that, like that class becoming mandatory if the meta were to allow it (becuz t3h d33pz), or for that healer to be weaker in certain ways to compensate (Disc Priests in WoW come to mind).
We can also talk about DPS skills as a mechanic advantage for healers. Use a DPS skill => get something that makes your heals better. That would help everyone adjust to using damage skills as a healer because it props up your primary function. I've mentioned it several times but no one seems to want to talk about that.