no one is forced to play by any mans rules, sure respect the team and help the team, that's it the ''lane meta'' supp/adc / mid etc etc is just like any other sport quarter backs, defenders, point men, leaders, trailers, mid fielders etc etc.
a good example here is from the NA ranked ladder, R6 last season had an ADC main Ahri, thats not meta or normal but it happened and its what he made work for him (or her).
my point is, you can literally make anything work as long as you help the team, that singed Support only got banned because he refused to help the ADC and took the jungle from the jungler detrimenting his own team, regardless of win rate he had many complaints and many reports and many people did not want to play with him, not because of his singed but because of his selfish non-caring style.
i play TF support, people mona, then we win and they dont moan, many people play off-meta the difference is people want a fun game, if you go full AP lee and do nothing all game people will be annoyed, thats natural if you go to the park for a 5-aside match either in a league or just with mates, your be pissed if people didn't take turn in goal or just picked up the ball and run around with it for 40minutes doing nothing but be annoying.