Didn’t they just say that pickrates are not a proper argument, otherwise you could say Lucio and rein were both extremely OP when their pickrates were roughly 95% to 80%. Pickrates =/= overpoweredness. You are deliberately being ignorant of the argument to drive your own agenda or just being illiterate at this point.
Just because Dva can fly doesn’t mean she can do what roadhog can do, for instance. She cannot pick apart enemy teams from behind rein’s shield and bring them to her team to destroy nor can she bubble herself and her teammates to give herself more attacking power or use an ultimate to initiate an ultimate combination. Or are you trying to tell me Roadhog and Zarya of all things are somehow weak characters? Because they cannot fly? What a laughable notion.
Just because roadhog and zarya cannot actually fly doesn’t mean dva outclasses them as a tank or as a character. They have their own strenghts on their own maps where verticality is not an issue like kings row. Sadly, most maps have a lot of verticality and having high ground versus having low ground on fps where things like headshots are a thing and line of sight is an advantage that cannot be ignored. But having vertical mobility trait does not mean roadhog or zarya are not amazing offtanks on their own, both of those characters are very good in fact at what they can do.
If all maps were horizontal like kings row, dva would never be an issue and the most used offtanks would be roadhog and zarya, outside triple and quad tank. Dive excells in verticality and mobility still has no counters, so ye you get bunch of dive chars.