He said nothing about the medication in question, so does your original comment mean that RFK is guilty of statistical murder and should be punished for his general vaccine skepticism? I'm not sure how else to read "another case of statistical murder that can't be punished as it should, unfortunately".
If you witness child abuse and say nothing, you bear some responsibility for its continuation.
If you’re the top health official of the country and spread doubt about numerous public health interventions, including actively suppressing research showing their safety and efficacy, yes, you’re guilty as fuck.