The day Big Pharma finds a way to profit from patients not consuming anything but water for 10 to 40 days and getting rid of diseases that used to require lifelong drug regimen, the research flood gates will open. But ain't gonna happen in my lifetime. There's no money in fasting, and no one can patent it.
Regardless of whether or not this is true (and really it seems to me to be a bit more malicious than large groups of people are consistently capable of), this isn't a super useful way of looking at it. Rather than speculate on why things are the way they are (especially if in this case it's pretty much unsolvable without really big changes), shouldn't we look to solve the problems this is causing (which by and large involves "merely" collecting large amounts of data, which is much less difficult and much more attainable in the short term)?