You could have said the same about say, pre-AI deceptively edited/ragebait/made up content going viral on FB, "actually this is good because soon people will realize they are being tricked/lied to, they'll think extra-critically before sharing dubious content next time".

Which has not happened. I can only see AI videos/images making the problem worse as people are fed personalized, narrowly targeted content that seem to perfectly appeal to their own beliefs/biases/emotions/etc.

Also, if anything it seems like we will have to trust authoritative groups more thanks to GenAI. If I have to consider every video on the internet from e.g. Iran as fake, I'm going to turn to NYT or WSJ who can be relied on to (usually) share only original content, or highly vetted 3rd party content.