I don't hold the highest view of LessWrong and the whole rationalist shtick. This post exemplifies why. Underneath this post is the assumption that the author is so much smarter than everybody else because they are Rational with a capital R and can therefore harness the power of science to make a vaccine[^1]. Again, that's an incredible amount of hubris. If there's one universal truth about science, it's that it is extremely specialized. Just because someone knows a lot about chemistry doesn't mean they're qualified to talk about biology. There is no magic Rationality that can have amateurs making vaccines a good idea. Unless you are an expert in vaccines a priori, you cannot suddenly become one in a few weeks.
Heck, I'm skeptical of doctors who are not infectious disease experts giving advice. I still hear a lot of "well my sister's neighbor's brother is a pediatrician and he said XYZ". Doctors are certainly more educated than the average person, and if this was a minor medical problem I'd certainly take a random doctor's advice. But this is a pandemic with a novel disease. Listen to the infectious disease experts.
[1]: Quite honestly this feels like a plotline from Harry Potter and the Methods of Rationality