Your sarcasm amounted to nothing more than a cheap hot take.
If you look at this season plenty of good players aren't getting play time because they don't fit the meta. Team are just now STARTING to play DPS comps. Unless Taimou had been practicing Brig on his own and was a better Brig than Zach, putting him in might not have made a difference. He says he did great at the world cup, and that's fine, I don't think he was amazing, on top of the OWWC not being a great barometer of how well he'd do in the league.
I'm not saying he's not a great player. I'm saying his impact is not likely to have been as large as you, and Reddit, are saying it would have been. Was it a mistake to not put him in? I never said it wasn't. But I have been saying that it's not that clear or obvious, to use your own words.