The sites do not routinely call themselves out. Rather they acknowledge to creating fake stories once overwhelming evidence of such is presented and spread to the point that it can no longer be ignored. And of course such acknowledgements invariably come with appeals to plausible deniability in their own culpability -- which I think should become decreasingly plausible to anybody of the slightest bit of objectivty, given the regularity of such 'errors.' The only reason it might seem routine is that the sites you've named have all put out an increasingly large number of false stories.
However, we're not in "deep doo-doo" just because you happen to think these organizations have value. When we would be in "deep doo-doo" is if we became monolithic in thought. It's great that you think Seymour Hersh has no credibility. It's great that I think your preferred sources have no credibility. It ensures we remain a critical audience which helps work as a safeguard against falsehoods. As your preferred sources are regularly outted, it is in large part thanks to people like me. And should Seymour indeed be shown to be generating fake news, it will be largely be thanks to people like you.
The only thing that's really changed in society is this fear of conflict. Disagreement, or the belief that 'others' are being misled by fake information, is hardly a novel thing. It's the self righteousness and fear of disagreement, arguably driven by social media echo chambers, that is the novel thing -- and that is the thing that, if anything, might leave us in "deep doo-doo."