What's odd about using bo2 as the landmark is that it's not actually different from best of 1: Every game matters. Every game directly results in more points for qualification into playoffs. Best of 3/5 is the only one where losing an individual game basically means nothing. Sure, sometimes you're tiebroken on game score (LPL did that this year for like five teams) but you can just 18-0 your season and not have to worry about it.
Either way, my comment was more about directly stating how Armut should clearly be able to have a larger champion pool than he does. I agree there are a plethora of reasons why the LCK and LPL have consistently outperformed the LCS and LEC (two years of Caps notwithstanding). It's clearly happening. It's definitely true.
I just take offense to the mudslinging at how it's all just Riot's fault because the league structure makes it so hard to improve. That's simply a lie. For reference, in 2016 summer and all of 2017 the LCS played best of 3 in regular season. No LCS team except Cloud9 got out of groups and they didn't win in quarterfinals. That's the exact same as every other year of LCS as Worlds. Meanwhile, viewership plummeted so maybe that's not a very good system.
At the same time, the LEC played best of 2 for 2016 summer and bo3 for all of 2017. 2016 was the year G2 bombed out of groups and H2k got their free quarterfinal over Albus Nox. Credit to H2k for topping the group with EDG in it, but that's all they did. 2017 had two teams in quarters, which seems about par for the course. Maybe Doublelift wouldn't have choked against SSG if he was playing best of 1 all year and realized that individual mistakes matter. Who knows?
For reference, the preceding year, 2015, had two LEC teams in semis. 2018, where both leagues went back to bo1, had the LEC's first world final since 2011 and the LCS's first semifinal since 2011. Sure seems like evidence for bo1 somehow being the better system for both leagues.
Maybe it's not the league structure's fault. Maybe people should stop picking it as their primary punching bag.