@eng1
pretty sure it's a matter of context. if a fighter is capable of reasonably holding agro and doesn't need 300% of their max hp healed per healing skill cooldown cause they pull too much, it's usually ok. but this isn't about every fighter ever, it's about the BAD ones. and in my experience as a healer in MMOs is the whiniest of fighters are usually also the poorly spec'd type that think they are perfection personified even as they take on more than they can handle but blame you when they inevitably die. and they die. A LOT.
I had one particularly memorable raid that had a level restriction of 46 - 60, I was a lvl 48 cleric, I ended up partied with a lvl 60 warrior. it quickly became evident that out of the entire raid group (15 of us) that somehow **I** was the ONLY person capable of surviving while holding boss agro in the whole group. and he claimed to be a tank build, a warrior 12 levels higher than me, with gear two full tiers better...but nope died in 1-2 hits, meanwhile with my buffs and specs I could heal MYSELF, heal the rest of our WHOLE PARTY as needed, heal HIM (from AoE damage while I was holding agro at least...), rez HIM pretty much every cooldown, and STILL attack enough to hold agro ~97% of the time. the other ~3% being when he had been alive long enough to deal an agro stealing degree of damage...then he died and I had agro again...we somehow won with literally seconds left on the timer
and after carrying the raid, guess who didn't work hard enough at healing? yep, since he was too damn weak to survive it was my fault for not healing him enough. me and almost everyone else in the group told him to shut up and get lost
and that's to say nothing of the raids where it's you the lone cleric, no tank, 5 player party limit, but somehow the other 10-15 people in the raid still expect you to magically know they are low on hp and heal them on top of keeping your party alive? how? and don't even get me started on the everyone got wiped so rez me first fights...I've literally rage-quit out over those, not often, but the worst instances, bitch me out for not healing you the whole way through, leroy jenkins into the masses like every sane player knows not to do, then fight over rez order and I just let the arrogant ****s heal and rez themselves while I go do something more productive than a 100% pre-failed raid