That is just illogical. It's like if I added some test results done on instrument X would be rude because that would, in your mind, require everyone else to do independent validation of the specific test instrument.

No. The same way people can implicitly trust things measured in specific ways, people know in what AI's are good at. If they include a ton of references from good domains, in a casual context that is already quite strong. Let's not pretend we're working with weapons technology or something lol :)