Why does the lack of indexes matter? Especially when the size on disk is so much higher? Defining a sensible index isn't an unreasonable or daunting task, and minimal effort in CH got a 4x speedup over QuestDB. "It's faster if you invest literally zero time making it efficient" doesn't offer any practical benefit to anyone.
If it was demonstrated that Quest did a better job overall in the majority of cases where an optimization would have been missed, that's one thing. But this feels awfully nitpicky.