I think it's that he expects. . . no, DEMANDS an experimental, rush-job vaccine to be as safe and effective as one that's been developed and refined for decades.
Which is about like expecting a Model T to perform like a 2023 Mercedes, but unreasonable expectations and demands are the hallmark of the partisan.
For example, face it, Biden could reduce undocumented immigration by 99% and the rightards'd never give him a shred of credit. They want a WALL, a monument to White supremacy! They don't give a rap if it works, or to what extent.
In fairness, leftards are no different. I always said the political spectrum ain't a line, it's a horseshoe, with the extremes much closer to each other than either is to the center.