If you trust the source, you can trust the image/video/document/whatever.

I think this is key. There have always been sources that have been incredibly trustworthy that people choose to ignore. Like AP News or Reuters for example. Sometimes they might make mistakes but as long as they keep fixing them in a timely manner that's what's important.

Yeah it's still possible they could post an AI image - but that's why you compare sources.

Besides that would ruin the credibility they've spent decades building.