Er, in savage it generally does have the same impact. Lets not forget that not only is this tier quite forgiving compared to Gordias/Midas, but we also have echo and gear as well. But case in point, whenever I'm helping kill groups on A12S, if a few DPS die in the earlier phases, most of these groups will simply wipe and restart rather than struggle on and have to deal with 2 or 3 sets of fountains in the final phase.
Uh no they aren't, I hugely enjoy the challenge of pugs, of the 40+ A12S kills I've upload since echo got introduced, 8 of them have been with my static. The rest are all pugs, but by all means have a look yourself.
And as for someone that's never failed at cleric, please lets not get stupid now. *EVERYONE*s done it. The difference here is the frequency of mess ups, how well they can recover and how far that players comfort zone extends before they get overstretched and start to lose consistency. Top progression healers can can comfortably do a 4 hour raid sitting like clockwork and barely drop a single GCD in the process. Once tank busters are understood and tanks have a cooldown rotation that works, it's generally the DPS that cause wipes during early savage progression. This isn't because they need to get good, but rather because they generally have to push further out of their comfort zone than anyone else.
This isn't a specific special snowflake healer issue. The exact same thing applies to DPS as well. Get greedy, get flustered and you're going to mess up and potentially cause a wipe regardless of what job you are. A12S demonstrates this beautifully even with echo.