I really appreciate that you have taken the time to provide feedback, but we have to be honest here. Tanks are not squishy in FFXIV, I have completed coils with my Paladin synced, OT Myths of the realm and as far as "casual" dungeon and trial content is concerned even my gunbreaker feels study enough to take a good few hits without panicking. When I am healing I find that if you have a warrior as tank you can just chill and focus on green dps throwing out the odd tetra/DB/Regen and if things get spicy some regen, aoe healing and Assize.
A good tank using their abilities correctly and not face tanking mechanics should never die to a buster or incoming damage from the boss. Its actually laughable that dungeon mobs can be more threatening that some boss damage mechanics for tanks. The front page post highlights succinctly the concerns that healers have in FFXIV. I have mained healer in every MMO I have played, I really enjoy FFXIV, I love the story and I think I speak for most here when I say we are not being mood hoovers, what we are saying is that healers don't have any real skill expression or agency in how they play, the skill floor is relatively low, the leveling experience for new players is dreadful.
Have you leveled a white mage from 1-90?, if so share your experience, if you haven't, please do so and let me know how monotonous that experience was when dpsing mobs. Healer's shouldn't be highly effective at DPS compared to DD, but there should be a trade off for when you switch from healing mode to damage mode, that is not there, there is no synergy between heal and dps play style in FFXIV.
The starter journey for most jobs in FFXIV is slow and lethargic but as you level up you, you can feel the potency difference in your abilities and your character getting stronger. This is not the case with healers, and it's not limited solely to WHM, look at Sage, SCH and AST read the feedback players who enjoy playing these jobs are providing.
You work in IT so you have an understanding of ITIL/ITSM with the end goal being continual service improvement, what this thread is aiming to do is no different, it is end-users providing feedback on where they think the service can be improved. Everyone who has commented in relation to healer issues is a paying customer, clearly they are concerned about the product and only wish for it to be better, this is the core tenant of customer service excellence. Rather than shouting down and dismissing these concerns - people should encourage and support it.
Sadly the majority of people who has posted against healer concerns have largely just dismissed genuine feedback as healers "having a whinge" or being negative nelly's. This can't be further from the truth.