>>13654358No. Ninetales is mediocre all around. Only reason it's OU it's because it's the only legal Drought user so far.
What Charizards lacks in support he compensantes in raw power since he can ALWAYS put weather up (because the ability only activates when he goes Mega), enchanced Special Attack and fire moves boosted by Sunny Day, and probably better speed. Furthermore it can beat Abomasnow and Tyranitar 1 vs 1 and has a shot against Politoed thanks to the sun. Also it can't be trapped by Dugtrio.
You have a point with switchs, however you're forgetting that Rapid Spin is a thing, Volcarona is neer seen without a spinner and most Sun Teams already include a Rapid Spinner right off the bat, because Flare Blitz abusers can't afford to lose HP