Tbf I see people diamond+ that I could very easily mistake as gold or so with how they miss kills and make horrid decisions. I think it's more of a remnant of the ranking system being squished towards cramming everybody near silver-plat though.
I know somebody posted the LoL ranking distribution, but lemme post it again:
http://www.leagueofgraphs.com/rankings/rank-distribution
The bottom two ranks are around 3/4 or so of the player base. That goes all the way to the bottom of their skill ladder. Bronze tier in OW (the entire bottom 1500SR) is only 6% of the playerbase. Then like 80% or so of players are all stuffed into silver-plat.
No offense to Silver-Plat people, but a lot of people in that skill category could easily be put next to a bronze player and I might not tell the difference. It's just their algorithm skews higher than that so it actually requires a bit of effort or a whole lot of solo q bad luck to end up that low.
I'd rather the matchmaking just skew people down to the bottom, and those who care enough to get out will get out and have a rank worth a bit more. Between DQ and this matchmaking it's just kind of a crapshoot when I see a ranking emblem who is good and who isn't. In LoL when I see people's rankings I usually tend to get a pretty decent read on how people are gonna play. Boosted monkeys exist too but it's a lot harder to do there.