Editorialization is far, far different than outside parties or platforms controlling content...
The key difference is that editorializing affects individual outlets, or groups of outlets under one owner. In that case other parties can simply create the own competing outlets to provide a balance, aka a marketplace of ideas. But when it's a top down control from government or mega-corps then the controls applies across the entire marketplace and across all organizations/mediums, and is therefore far more harmful, open to abuse, and ultimately chills speech.
Not to mention in the top-down scenario the source of what's "appropriate content" is usually the most vocal special interest groups, lobbyists, or worse the latest public outrage of the day - not some editor/company trying to deliver what they think consumers want most. But instead other parties trying to control what content other people should and should not be allowed to produce/consume.
The only way to push back is by rallying your own outrage, lobbyists, and special interest groups - a highly unoptimal process, valuing the powerful and entrenched parties, not what is "right" and moral. And if history is any indication, bad laws/regulations rarely get removed anywhere near as quickly as they are added.