I made the original X post. I think Anderzz's quote rt effectively explains and summarizes why controller is best,
"The one who controls the smokes, controls the pace. Your team isn't execing before your smokes go down; they're the prerequisite and trigger. Your team isn't clearing mid/intermediate spaces without smokes for one of the adjoining corridors; they're the prerequisite and trigger. By putting IGL's in the position to control smokes, you're putting them in a position to control the game."
The data I gathered also shows that controller led teams tend to do better this year, and 8 out of 13 of them qualified to Champs. Compare that to 7 out of 25 Initiator led teams.