>Journalism and activism can’t be separated.
They should and they can. Either have a separate publication, or at the very least have a separate, clearly delineated "Opinion" section. Otherwise you run the risk of media trust becoming very low, and thus media losing its ability to guard the republic (or the democracy).
Consider a similar assertion - "journalism and advertising can't be separated" - it's obviously false. Granted, there is some undue influence from advertisers to be expected. However this is considered a negative that should be avoided. And indeed the good practice is to have a "firewall" between the advertising department, and the news desk, in any publication.