I read about Bethesda's Russian hacking yesterday. Too funny. I remember a couple of the others you mentioned. Is it laziness, ignorance, both? Part of it is the lack of real journalism. The people reading the news don't qualify as journalists half the time. It may also touch on the practice of using stock footage to spice up the news, rather than sticking to images or video from the reported events.
Remember the story of an airliner crash where newsreaders were reporting the pilots' names as Wi Too Lo, Ding Bang Ow and such? I can't help snickering now, but that was a real disgrace. Talk about not checking your sources.