I had an interaction a few weeks ago where I made the same obvious statement -- that everything is political, like the price of milk is political -- and the someone said I was making it political, like gun rights.
That conversation stopped there unfortunately, but it made me realize something.
Politicized is different from political for a lot of people.
Maybe most people realize the price of gas is political, but they don't think that their internet bill, or whatever, is political. It's just market forces to them, or whatever they assume about capitalism being good.
Ultimately, I think my point is that when people say things like foss shouldn't be political, I think they're saying they agree, but they would lose their in-group status be agreeing with something "woke" like ethics in software. So they have to make a proxy argument about what is and isn't political.