Right about what? We know for certain masks don’t stop the spread, the vaccine doesn’t prevent us from getting or spreading the virus. So you’re 100% wrong there. The only other claim is lab vs nature. US intelligence believes it was a lab, but we don’t know for sure and you certainly know less than them.
Although usually I found David's posts pretty interesting and well written, this post does not make a lot of sense.
"Later, that the vaccine would prevent you from getting the virus. Finally, that if you were vaccinated, you couldn't spread the virus. All of that, and plenty more, turned out to be false."
It's full of questionable claims (see above) and his reasoning is hard to follow, unless for anti-vaxxers maybe.