I agree "politicalness" is a spectrum. I just disagree that it's possible to be anywhere close to zero if you are running a company.
The current American notion of "nonpolitical" is based on a post-WWII period where there was a broad consensus on a bunch of issues, and I think that consensus was in large part driven by the moral clarity provided by the war. But that started to decline circa 1980: https://xkcd.com/1127/large/
It was still propped up for a while by common interests between southern Democrats and non-northeastern Republicans. A big common interest being an opposition to civil rights. But most of the blue dog Democrats are now Republicans and liberal Republicans are basically extinct, so that middle ground has basically vanished.
For you "common sense" is doing a ton of work here, as is "widely considered". But as far as I can tell, it's tautological. You want your priors (or those of dominant groups) to be considered nonpolitical, while those of others to be political.
> claiming that any act that has any impact on anyone is political
What is politics if not people regulating the impacts we have on one another? Of societies deciding whose pain and whose gain is most important?