I forget how useless it is to type anything with ppl like you around.
As i stated, in case you might bother reading, those are all things we CAN do IF needed. Doesnt mean you have to be a turd and use PoM on cooldown as a SP, nor does it mean you have to optimize your position for the highest possible healing. It does, however, mean we CAN do it if shit hits the fan.
If you personally prefer cheesing dmg staring into nothingness hoping for the best ignoring your raids situation I aint judging, play as you wish.
The fact remains we can with quite little effort (imo throwing a pom, gripping, using a gcd for void shift/ popping VE isnt exactly a great effort nor dps loss) help out the raid quite a lot, which is ä, again in my opinion, nice.
We are more than qualified for multiple 25 heroics, ie Elegon, Will of the Emperor and Sha to mention a few "easily" toppable.
If you want to start comparing the healing a shadowpriest does while spamming pom and renew vs an ele shamans chainheal spammin you are however very lost.