Seems like a reasonable plan to me - if there *were* an outbreak of some massively fatal disease (which, let's face it, we're rarely far from statistically...
), you'd need this on hand. Fast. Couldn't get them on short notice, so just stockpile them in advance.
I don't think there's anything nefarious or conspiratorial here, it just seems like common sense.
But, people can find conspiracies everywhere. Google 'chemtrails' sometime if you want to scream at the stupidity of people. They make the flat earthers look *sane*.