Low elo ranked is not the lottery
High elo ranked is.
In high elo ranked, you are likely to not be good enough to influence your team much. In low elo you can just go 45-0-0 and carry games by yourself regardless of your teams, but in high elo, if your bot lane feeds, the best you can do if you're really good is go 8-0-0 and that's not enough to carry a 0-12 bot lane and a 3-6 top lane. That means that you actually have less control over the games in high elo than in low elo when you can 1v5 stuff.
(and yes, I do have experience with this stuff, I'm just posting on my smurf account that I use when I get high ping so that I don't hurt my rank on my main account)