You're confusing research with development. Research will tell you only that beta blockers will work (and that came from a series of NIH grants), but only development will produce the actual beta blocker drugs. The goal of clinical "research" is to develop the latter.
I am sure you have heard of R & D.
I am not confusing either. Pharmaceutical companies must do both. I know, I did both. They do not rely on the NIH for research.