- Adc is one of the more forgiving roles to counterpicking in all elos
- It does matter, because your qualified early snowball is important to creating the momentum of a game. Even if you're in an elo where players are flubbing a lot, you have a dramatically better chance of winning during a hyper carry, than just "participating at a decent rate."
I can throw an example game out to you (one that irritated the crap out of me)
https://blitz.gg/lol/match/na1/Illabethe/3249336228
Short story:
Xayah fed so fast, that both Senna and Caitlyn had a full item by 8 minutes! (I died once prior to 8 minutes as collateral damage to her 3 minute yolo duel, while killing Caitlyn in the process)
Needless to say, no matter what I did as Soraka, it didn't matter, because I had 2 600+ range adcs who could basically trade off anything, and were item fed because of the 0/3 by 8 minutes Xayah. Senna's stacks didn't really explode (80 at 24 minutes), but she had plenty of control to counter my heals, and whatever she didn't finish, Caitlyn could.
They had the snowball, and the game was more or less decided because while Senna could get kills/assists, I couldn't get a significant income as Soraka post T3 support item, and the opportunity to gain some kills was already long gone (If Soraka's going to get kill income, it has to be early)
It's the difference in momentum between 54% Kill participation and 74% kill participation.