ADC has no Agency, Baron Buff and Mages do the job better @Meddler
Baron buff spawns at twenty minutes before the ADC is team fight ready, and it's doable at twenty minutes. The interaction between cannon minions and baron buff and in general are just better at the job. On top of that, even if the ADC wants to farm instead of playing the baron song and dance, they can't. Usually they are forced to play a fight for a buff that does their job without having items so they can do their job. Ignoring all of this, Mages just flat out do insane amount of damage to towers, for no real reason. Obviously it was a time when ADC was stronger and we decided to buff mages, buff baron buff, nerf enchanter items, nerf crit items, nerf adcs, nerf shields, nerf enchanters and here we are now. ADC's no longer have the support crutch, they had their items nerfed and mages are now the best at sieging. They are safer, they are higher level, they have a safer lane and they have the MOST agency for that baron fight. Why is that? It's okay though right, supports who weren't ardent, are still strong. Yeah except the best gameplay for that is to hit level 6/get mobis and roam because even if the enemy has 2v1 vs your ADC it's irrelevant to the damage your roams will do. Imagine that, the best gameplay for the "support" character is to not support. And the best gameplay for ADC is to not do their job and lock in Lucian/Draven and play for a 2v2 fiesta. Well done.