You say you are "exploring where that line is", but then continue pushing a single sided view by conjuring some perfect user archtype who simultaneously has very strong opinions but also can't be bothered to express them. I know users are unreasonable, but completely discounting their agency does not make for reasonable analysis.
I've merely put forth a straightforward definition of "censorship" - one where there is a third party censor who controls the content of speech.
To translate your scenario into an earlier time - if most people in a society don't want to hear thoughts that conflict with the teachings of the church, and they appoint someone to an office to approve play manuscripts before they're performed, is that censorship?
If merely labeling centralized user-uninvolved content filtering with the technical term of "censorship" makes you uncomfortable, then perhaps you need to revisit your own assumptions.