It is the very point that propagation of speach is not dependent on popularity but increasingly on alignment with powerful interests and it does a lot of damage. How could you miss that?
How "popular" are we talking, though? Taking a big picture view, "official" narratives are pretty popular whilst "alternative" points of view are niche. And modern AI-powered algorithms don't do a great job of promoting niche, long-tail content in general. For all we know, this might be the outcome of a random AI tweak that results in burying some content because it gets predicted as "unpopular".
All of these are algorithmically suppressed.
If the definition of popular is what you see on twitter, etc, then nothing popular is being censored by definition.
The only reason there are limited numbers of whistleblowers is that Tech companies actively brainwash their employees to think that the marginalized opinions are just some "small dangerous fringe nazi thing", similarly to how the commenters I replied to seem to think.