I don't really see that here though. He's over-generalizing, but you can't claim that some (many?) journalists don't do exactly what he mentioned. People expect what journalists write to be trustworthy, but too often what they write is not. Think back on the Covington kids saga. They were dragged through the mud and many journalists participated in it. If they get something like that so wrong, despite there being video evidence of the event online, then how are people supposed to trust what they write? Obviously not all organizations are as guilty of it. When I read something by Reuters I'm fairly confident of what I'm reading, but it's much less so with many others.

presumably actual journalists would train against unconscious bias... maybe you're saying we can't expect they be any better than your average person on the street.

I would argue that defending against Bias is the editors job, they are not there to catch typos!

This is true of almost everything human created.