Completely true. But we cannot reasonably push the responsibility of the entire internet onto someone when they did their due diligence.

Like, some people post CoD footage to youtube because it looks cool, and someone else either mistakes or malicious takes that and recontextualizes it to being combat footage from active warzones to shock people. Then people start reposting that footage with a fake explanation text on top of it, furthering the misinformation cycle. Do we now blame the people sharing their CoD footage for what other people did with it? Misinformation and propaganda are something society must work together on to combat.

If it really matters, people would be out there warning people that the pictures being posted are fake. In fact, even before AI that's what happened after tragedy happens. People would post images claiming to be of what happened, only to later be confirmed as being from some other tragedy. Or how some video games have fake leaks because someone rebranded fanmade content as a leak.

Eventually it becomes common knowledge or easy to prove as being fake. Take this picture for instance:

It's been well documented that the bottom image is fake, and as such anyone can now find out what was covered up. It's up to society to speak up when the damage is too great.