I follow someone on Twitter through cycling that is an antivax type. I continue to follow her to get an insight into what the conspiracy theorists are currently saying about stuff.
It would seem that the real (!) reason for this reduction in supply is one of:
1) It’s a cover-up for safety concerns (let’s just ‘slow it down’ for a bit until we know better)
2) There’s not a shortage – the illusion of scarcity will drive uptake of the vaccine amongst fence sitters.
3) It’s an excuse to extend totalitarian lockdown measures.
Just like to say that I DON’T subscribe to any of the above opinions, but it’s interesting to see how way-out some people are!