I initially thought this was about anti-vaxxers, which is also a kind of test to weed out people prone to group-think and irrational believes.

But yeah, making and distributing vaccines is a reasonably complex tasks that requires some level of global coordination. However, classic vaccines are actually not all that hard to make, a lot of the complexity comes from the regulatory requirements. Early into the Covid-19 pandemic some people actually made their own nasal spray vaccines, that probably were not that much worse than some other early options.