The point of vaccines is to extend human lifespan and reduce illness. It should be a relatively easy matter for them to show that taking more vaccines does those things, right? Assuming similar infrastructure and income (rough) between countries there should be some correlation between vaccine rates and healthcare outcome statistics.
We could even rate individual vaccines on how much illness and expense they alleviate. Perhaps some are more effective than others?
But to even questions anything about a vaccine somehow makes one an "antivaxxer" - someone who irrationally hates vaccines. There would probably be a lot fewer "antivaxxers" if the media and medical corporations did not respond like jerks when people had honest questions about vaccines, like they would when choosing any other product.