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.
Tbf the kind of person who might make this mistake is exactly the kind of person who would be embarrassed discovering the true meaning. The kind who doesn’t swear but is exposed to people who do and pick up the vernacular without the origins.