On the one hand, I agree, but on the other hand, this means that the ones supported by the billionaires will have the advantage.
Not that there's any guarantee media you pay for isn't owned by billionaires paying more. Or just promising things to bootlickers that they might never intend on following through on.
If the rate is so low in the US, why would it be unethical to do it there? You could also take samples from babies whose parents are getting or refusing the vaccine anyways. Sure, those decisions on their own will introduce more variables, but they could do a "outcomes of being raised by pro/anti vaccine/medicine parents" study.
If the goal was the truth, at least. It would be hard to do that study without any bias either way, with how political the whole thing is.