stinkbug
It's not exactly the same as pharma, but in the medical device field salespeople are commonly in operating theatres. Clearly the surgeons doing this do not have time to "verify" what they are being told. https://www.washingtonpost.com/national/health-science/why-i...
Americans would do well to stop idolizing doctors and realize that huge numbers of them are lazy, incompetent shills who routinely do a lot of preventable damage.
It said the studies have to be approved by a review board and that the researchers have to agree to destroy or return the samples when they're done.
I don't think we should cynically assume "he knows the answer is yes." He may be hedging simply because he knows it relies on the word of the researchers.
But biomedical researchers have been sensitized to issues of research ethics much longer than internet/data science practitioners. There can be significant penalties for procedural violations and in my experience people do not tend to play fast and loose with the rules.