In any field there's going to be variability in quality and it's not fair or wise to tar the whole field with the same brush but I think journalism sometimes attracts people who have a different relationship with facts and ideas than I do.
I read a piece by a moderately famous journalist a while ago (and I've been trying to figure out who even since with no luck) who when talking about his practice said that sometimes there _are_ no experts in a particular subject and the journalist has to do a 'deep dive' and become the expert. Now he didn't say exactly what constitutes a 'deep dive' but it struck me as profoundly arrogant and symptomatic of this problem.