I don't think we are talking about libellous content: as you noted yourself it is already covered by existing laws, and there's no need to invent additional reg

I don't think we are talking about libellous content: as you noted yourself it is already covered by existing laws, and there's no need to invent additional regulations for that. As for thing you call "self-censorship" there are two very different parts: pursuing correctness is not, actually, self-censorship, it's building reputation, and a long-term trust with an audience - and done essentially for commercial success. But there's self-censorship in media, of course, it exists because if political pressure, sponsors' influence, and last, but not least because most of journalists are not magical creatures, they are humans too, and naturally biased as all of us are. And I never heard anyone claiming this self-censorship to be good for society, and worth expanding.