Quinn, graves, and kindred were reworked and intended for lanes outside of bot and only serve as proof that the class as a whole can be made to have lanes outside of bot lane. Furthermore, Quinn has been strong top for well over a season while building like an AD assassin over a crit marksmen. Graves builds like a bruiser(deaths dance, PD, black cleaver). And kindred was a joke until they rebuffed her and spent over a season being trash.
Jungle also has Eve, xin, and camille dominating it.
Top also has gp, garen, and darius.
As for bot lane, Swain is the best down there, which you pointedly ignored. He is beating out other champions who can only go bot lane. This argument that ADCs are still the most common thing picked bot is pretty trash, honestly. Of course they are. That's the only lane many of them can play in and, as a result, that's the lane that many of their mains only play. Many people, myself included, only play bot lane to play marksmen. If they suddenly weren't the most common thing bot, I'd be concerned.
As it stands, even with their "high pick rates," many of them are only doing okay in winrate and most are sub 50. And a decent chunk of them also feel unsatisfying to play.