Why waste time say lot word when few word do trick :)
Also worth pointing out that Alex Wei is himself a gold medalist at IOI.
Terence Tao also called it, that the top LLMs would get gold this year in a recent podcast.
It's been proven that this accidental computation is actually helping CoT models, but they're not supposed to work like that - they're supposed to generate logical observations and use said observations to work further towards the goal (and they primarily do do that).
Considering filler tokens occupy context space and are less useful than meaningful tokens, a model that tries to maximize useful results per amount of compute, you'd want a terse context window without any fluff.