Literally a slight video edit made a particular group think Biden was chasing after some invisible chair during D-Day. For a particular group of folks it won't matter about AI, they can't even detect objectively provable false information that was done with the most minor of functions a video editor provides. Not even when the proof is literally a two second Google search for the YouTube clip of the original footage.
AI isn't ruining the Internet, the Internet was already ruined by people whose mind wasn't ready for the ability for the entire world to speak to every other person on the Internet.
I think back to that one episode in The Orville when they're talking about how they gave some backass society a food replicator and they killed each other within five years. That's the Internet right now. We are still in the baby phase of the Internet and there are still a ton of people who just can not wrap their mind fully around the tool that's in front of them. For some, it's like I gave a five year old a PSRL-1 and said, don't hurt yourself and called it done.
AI isn't going to hurt people with critical thinking skills, it's going to hurt people who never had critical thinking skills and those people are already rabid fiends running rampant on the Internet like there's no tomorrow.
Give everyone a gun and suddenly it gets easier to murder people. Imagine if you gave everyone a button to launch the nukes, how long before the human race eradicated itself?