Earlier quoted context omitted.
Doctors not too long ago would tell you that infants don't experience pain. There are a lot of not backed by science beliefs in the medical field that won't die until the doctors that believe them do. https://pubmed.ncbi.nlm.nih.gov/23548489/
'A new scientific truth does not triumph by convincing its opponents and making them see the light, but rather because its opponents eventually die and a new generation grows up that is familiar with it.' — Max Planck
PLENTY of science proceeds without anyone dying. Usually it just requires insanely entertaining loud arguments at large conventions. Go lookup the philosophical arguments about early thermodynamics and like statistical mechanics.
Science advances one unexplainable datapoint at a time.