Quoting Carl Sagen:
One of the saddest lessons of history is this: If we’ve been bamboozled long enough, we tend to reject any evidence of the bamboozle. We’re no longer interested in finding out the truth. The bamboozle has captured us. It’s simply too painful to acknowledge, even to ourselves, that we’ve been taken. Once you give a charlatan power over you, you almost never get it back.
The way I see it it's the scale and access. You can spin up an AI bot and make anything trending without a need to pay for a bot farm. And with how most media sucks at verifing sources it will be reported as truth.