> Journalists at established media houses are accountable, including to internal and external ombuds or public editors. They also rely on reputation.

Which is ultimately irrelevant, because most mainstream outlets are partisan and look after their own, both on the right and left. You only need to look at the ridiculous coverage of Obama, Trump, Russia, Rittenhouse and dozens more examples over the past few years. The people who peddled misinformation haven't suffered any consequences.