Today, if I record a senator doing drugs, whether I have 1m followers or 1 follower, it's a video of a senator doing drugs.

Tomorrow, when anyone can generate videos of senators doing drugs, we'll only believe it's a real video when it comes from the guy with 1m followers.

It's a similar problem but not the same. Reputation has always mattered to some degree, but in a world where everything can be faked, it'll be all that matters.