Moral judgements are subjective opinion by nature, fair enough, but I bring the crackpot label in for exactly what you say, thinking in absolutes, in black and white, instead of nuance.

In the real world, that shows a distressing lack of critical thinking and a further distressing abundance of dogmatism.

"Proprietary software is bad" -- Subjective value judgement.

"Properitary software is evil" -- Subjective value judgement that shows a lack of thought.

"You should always use free software wherever possible." -- Subjective value judgement.

"You should use absolutely nothing but free software ever" -- Subjective value judgement that shows a lack of thought.

I mean, the FSF "disapproves" of software that is completely free on its own (Fedora, Firefox), merely because they point out nonfree things you can use. (Fedora's firmware bundles and some repos, and Firefox's addons site).

That's completely idiotic. Apparently the FSF's "freedoms" do not include the freedom to run whatever software you choose if it's "unfree".