Sure, there may be honest and enthusiastic people. But their input would be essentially that of an ad: a product with 100% gain and 0% loss? That's never been observed, never; there's always a trade-off.
A less emotionally grounded, more balanced and nuanced description would be more accurate, honest. But it'd sell way less.
I see a lot of the recommendations expressing anxiety about what will happen when they discontinue - which calls into question the validity of the official treatment plan they are under and isn’t normally something you’d bring up in an ad.