I disagree, they are not talking about the online low trust sources that will indeed undergo massive changes, they’re talking about organisations with chains of trust, and they make a compelling case that they won’t be affected as much.
Not that you’re wrong either, but your points don’t really apply to their scenario. People who built their career in photography will have t more to lose, and more opportunity to be discovered, so they really don’t want to play silly games when a single proven fake would end their career for good. It’ll happen no doubt, but it’ll be rare and big news, a great embarrassment for everyone involved.
Online discourse, random photos from events, anything without that chain of trust (or where the “chain of trust” is built by people who don’t actually care), that’s where this is a game changer.
Sounds like the right call, I’d ban them too if those reviews are accurate.