You don't know if the opinion is expert. You don't know who that person is or what credentials they even have. Blindly trusting something that sounds right is a terrible way to inform yourself.
Bayes Theorem...the chances this rather milquetoast and balanced analysis was written by someone with no knowledge is vanishingly low IMO.
"Blindly trusting" is not the same as "learning some new questions to ask about the validity of the given claims". The Midjourney announcement is not providing detailed medical credentials either.
We don't know if any of the opinions on HN are expert for that matter. Yet somehow, it's survived and grown for 20 years.
they have md in the username
I'd agree more if MidJourney had decided to announce their product plans with a white paper instead of glossy 'product vision' marketing spin and virtually no information as to how they hope to solve the vast technical leaps necessary to convert the transducer chip they licensed from Butterfly's low-cost, handheld, pocket-sized USB ultrasound device into a contactless, 360 degree, 60 second full body scanner.
Given MJ's extraordinary claims and lack of detail, I thought the GP's response was well-calibrated, especially given MJ's unfortunate choice to lean into vaguely implying this has 'medical' utility, despite providing zero evidence (or even plausible theory) their approach could ever have diagnostic value greater than Butterfly's FDA-approved, handheld, full contact USB pocket scanner which is available now and plugs into a mobile phone. They are using 40 of the exact same transducer chip (designed for full contact use) from 200-400 times farther away. You can use the existing full contact Butterfly scanner today and just move it to 40 different angles. It would take a couple minutes longer, provide vastly greater resolution and is proven to have diagnostic value.