The best, simplest explanation I see is this: The DS was rolling out vaccines. Those plans had been in place for years and even decades. Their plan was likely to roll it out and drag this thing out for YEARS. "Vaccine will be ready in 2023 everyone! Just gotta stay locked down until then!"

So Trump initiated "Warp Speed" to speed up their plans. Also, people wanted a vaccine. Not people like us, but even a LOT of normies wanted a vaccine as a way to return to normal. In my own personal interactions, even those who were skeptical of the ordeal, wanted a vaccine to just come out bc they felt it would make it easier to reopen, etc. Even if they would not take it.

Trump just gave people what they wanted, but he has always encouraged people to make their own choice. After all. that is all we want right? To make our own choices.