The word politics has basically split into two meanings that we swap between without noticing. There's the original sense, the art of navigating collective decisions, how we share power and resources. That version is unavoidable and actually kind of noble. Then there's what the word has come to mean in practice, which is identity-driven team sport. My side versus your side. Performance and signaling.
When you say "it is, in fact, about politics" you're technically correct in the first sense but you're activating the second sense, which is exactly the frame he's trying to get people out of. He's trying to create a space where people engage with the substance without immediately sorting into camps. That's valuable even if the distinction is a little artificial.
It's kind of a trap honestly. The escape hatch from tribal politics has itself become a political move, so you can always say "well actually that's political too." True, but not very useful if you're trying to get anywhere.