>>56050663I don't know why you think that a type's viability is tied to how many strong Pokemon it has. All the Tapus got dexcut, and many of the new fairies got BANNED for being too good.
Flutter Mane was the 2nd fastest quickban in OU history behind only Regieleki and ahead of Marshadow and Zygarde-C. If OU didn't have bans, there would be an S+ tier of OU inhabited solely by Flutter Mane and Magearna.