It can be true that news has always struggled to get certain/technical subjects entirely accurate while also being true that there's been a serious decline from an earlier point to now.
Gell-Mann amnesia isn't about being "not entirely accurate." The news has commonly gotten things completely backwards and completely wrong, from physics to babysitting. "Wet streets cause rain."
Almost like an LLM hallucination
Ok, but are you arguing that it's always gotten as many things completely backwards and as completely wrong as often as it does today? If you're not arguing that, then it seems like a little bit of whatabout-ism to say "well they've gotten things wrong before." If you are arguing that, then that's fine, I can see your point and there's a historical case to be made there.