This is part of the problem. None of these investors, including YC, have domain expertise. They only preach that the founders themselves should have it, but they are the ones giving the funding. So, in the end, they only look a perceived credentials of the founder and not the tech, which is BS. No one with strong credentials and solid tech would need VC funding, they already have grants. And by then, private equity would be lining up.
Most investors have a very low understanding of actual biology, or even anything outside of "IT". See: uBeam