Those people generally got shouted down when Theranos was still the hot story in SV, and of course after everything came out suddenly everyone knew it was fishy all along, which is just absolute bullshit. I remember reading comments here on HN suggesting that people saying Theranos was fraud were motivated by misogyny, just absolutely infuriating stuff.
So now we have an AI company coming out with promises of a revolutionary leap forward in medical imaging, in terms of cost and information gathered, and they're not using some sort of revolutionary sensor that they've invented, all the "hard" engineering has been done by other companies that have been in this game for decades at this point and how have R&D staffs with deep knowledge and expertise, but who somehow lack the ability to take the next step, they're coming in with the software and automated interpretation, which is basically the "?" step in the underpants gnome business plan.
The real truth about stuff in the biology and the medical world is that its all insanely hard due to the complexity of the systems involved, and there are tons of skilled and smart people who dedicate their careers to moving this stuff forward. There are really no low-hanging fruits being ignored by "the establishment" waiting for an outsider AI company to come in and overturn the table. Progress is basically won by sweating it out at the lab bench and accumulating a bunch of hard-fought incremental wins over a decade or so. Its frustrating that Elizabeth Holmes is still in jail and yet we're all here forgetting every lesson we should have learned from the previous go-round.