We as a society have decided that rampant mis-information and propaganda is only worth solving if we can automate it. If we actually have to pay real people real money to fix it on an ongoing basis, that's just too expensive.
Sure there are problems having Humans doing this work too, but they are still way ahead of AI in this problem space.
How long do we wait for automated solutions while these problems impose real costs to society?
If you want humans involved, you end up with a gate keeper, which essentially means "unless you're an accredited media organization, your content is considered fake", because you can't vet individual pieces.
I think real solutions are gonna require us to break out of our tech-focused approaches and find ways to get Google, Facebook, Twitter to really start to care about fixing this stuff. Unfortunately I think that means it'll have to start costing them.