The human body is a complicated thing, but while it's hard to improve, it's very easy to screw up. And screwing up someone's health can have consequences for them that last for years or decades. It can literally ruin their life. If that happens it won't be much comfort for them that their sad story has led you to pivot to a more promising approach.
For all the intellectual firepower of people in the tech community, there is a curious strain of anti-intellectualism that comes forth in projects like this; an eagerness to discount the expertise of people who have studied a subject for their entire lives, just because they weren't CS majors. It's like trying to send a man to the moon without working with any aerospace engineers. I honestly do not understand it.