It doesn't necessarily work backwards. Not the same concept.SiFly wrote:
I've won a ranked as soraka jungle. Doesn't mean people are happy that i picked it, same goes with those other picks you listed, though jarvan might be decent as support if the enemies don't have jumps/dashes.
If you don't prioritize excessive ward coverage, alternatively sustain or generally slightly stronger/more CC you can always use that extra position to get some more dps and a different kind of utility. Just about anyone clearly "works" as a "support", but you would generally have to favor champs with either good base damage or good utility. Orianna and zyra have CC and utility, elise has health % damage, your jungler can get aegis and everyone should at least buy a few wards once in a while. Of course you can build damage increasing items on a support as well, but it should be obvious why say elise support, given nami doesn't land an amazing bubble or doesn't have her ult up, can be far more useful in a teamfight.
In uncoordinated play such as low level yoloqueue you'd often benefit more from significantly more damage than a squishy ward-bot. And if you're bad at the general support champions and are forced to support anyways I'd rather have you play a champion you're good with despite it not being what people would generally pick. Chances are you'll do better with that pick than if you'd play first time blitz and get 500 fieldgoals in a twenty minute game.
People don't like unconventional picks because just like this community, everyone are xenophobes. Whenever you try something outside of the meta people either assume that you suck and don't know jack or that you've seen it on some stream and expect the outcome to be the same. Just go ahead and pick whatever you do well with. It's a game, froggen wont come knocking on your door ready to beat you up just because you played jungle anivia.