And yet any random person on the street can easily flag something as being political or not political. I don’t accept that everything is automatically political. That is just an unrealistic argument that doesn’t match the reality of how the word is used.
You're correct. Almost everyone can efficiently categorize things they disagree with as "politics", while categorizing things they agree with as "common sense".
Again this is hyperbole and is not how people think. The politicization of everything and denying that some ideas are apolitical are tied. The latter is a false justification for the former.