Just because a class can get moderate performance out of 'dumbdumbs', it doesnt follow that it has to thereby be trash (and a complete non option) for hardcore players, right? Take hunters in wow. They were designed to be a very easy class to pick up and play, but that didnt mean they had to be garbage if put in the hands of a skilled player. In fact, wasnt that literally one of the core philosophies of blizzard: "Easy to pick up, hard to master"? Just because a class has a decent skill floor, doesnt mean it shouldnt also have a comparative skill ceiling with other classes in its sphere. Making one class 'the dumbdumb class' just means no one will play it. Experienced players will know to shy away from it at the outset because it is less effective at more challenging content. Whilst newer players will have no idea what they want to do 400 or so hours from starting the game, and will have no idea if they have aspirations to do more difficult content later in the game... so why waste time on a dumbdumb class?
Anyways... that all in mind, i'd also like to stress that how i play has (and should have) no effect on actual challenging content. I want the freedom to press the wrong button, get confused, run around like a headless chicken when a wall of shit goes off, forget to keep my dots up, die now and again to a mechanic i completely forgot about or just didnt know about etc etc... This DOESNT mean that i want to be a drain to my party or annoy everyone in group. I'll try my level best to not do all of those things in any party im in. I just want to not stress over much when it does happen. Now, were i to be more hardcore focused, id probably take more time to prepare myself. Id probably spend a lot more time at training dummies, maybe watch a few more guides, maybe read those 100 page documents on savage/ultimate fights, and generally raise my game a bit. But i just wanna enjoy the story mode version of the game. I dont want to remotely comment on, or argue for a dumbing down of any content above my level of commitment to make it more accessible. I just want chill content, where flawless execution isnt expected and even with a bunch of mistakes (from anyone in the group), the boss still has a decent chance of going down. And for the most part, i get that. So, i'd genuinely dislike the idea of bard being even further dumbed down to accommodate my personal skill ceiling.
As for pannonian's point on why i dont want to heal though... eh... its too stressful. I finished the entire msq story for 6.2, watched a guide (i can never go into a fight blind because i feel so much responsibility for the groups success), and... worried. It took me about 2 months from having the 6.2 trial on my quest log for me to actually get round to completing it. Then a week later 6.2.5 came out. I was so confused why i couldnt do the new tribal quests. Eventually i realised i had to finish an optional dungeon. By now im super discouraged. So i did hildy instead... and went to collect my new weapon reward only to realise i needed a bunch of tomestones from dungeon running. All i could think was how much my genuine trepidation of stepping into dungeons as a whm was negatively impacting my experience and joy in the game. I knew the only path was to find a class i enjoyed running dungeons on. So that's why i dont want to play healer. At all. Its weird it took me 400+ hours of exclusively playing a healer to come to that conclusion, particularly since id complained vocally (on these forums) about how much i dont want to run dungeons or do trials as a healer and the pressure i felt playing it, but here we are...