My immediate reaction to his

The doomsday virus has a first-mover advantage over the vaccine. The time that people start to drop dead from the virus is the time you start to make and distribute a vaccine. Even if AI can design and synthesize a vaccine within hours, how fast can it be rolled out to the general populace? It took months to distribute the Covid vaccines, even when we already knew how to make them. You have to physically load the doses on trucks[...]

was just 'make a viral vaccine with a shorter incubation period and infect everyone'. Handwavey problems require handwavey solutions.