You are overinterpreting what they said again. "Go/Dota/Poker/Diplomacy" do not use LLMs, which means they are not considered "general purpose" by them. And to prove it to you, look at the OpenAI IMO solutions on GitHub, which clearly show that it's not a general purpose trained LLM because of how the words and sentences are generated there. These are models specifically fine tuned for math.