Well China made its own masks and also managed a staff a fully operational medical system and pharmaceutical industry ad the same time. So clearly a single country can do all of this. Furthermore I think most countries would look at how China managed the pandemic and be impressed by the results. The masks are not a singular item. They generalize to a whole slew of critical components that a functioning society needs like pharmaceuticals (and their precursors), or half the global electronics supply chain. These resources exist in a time of peace but in a crunch they will disappear.