The catch is that there are thousands of promising therapies in animal models/pre-human testing. A very very tiny fraction of them will ever make it to market for a variety of both good and not-good reasons.
From what I saw, there are very few experimental therapies that claim 100% efficacy, no side effect, no patent on complex engineering process to produce the drug.
I agree with GP that it is very notable.
I mean if it works on humans, which is not a stretch, colorectal cancer is done. It's huge.
What's the difference between a good and not-good reason to not go to market?