This case is harder. Medical questions about what happened to a victim are often highly relevant, and doctors are legitimate, credentialed experts qualified to speak on that topic. If they believe based on their training and experience that suchandsuch symptoms mean blunt force trauma, how could a random judge evaluate whether they have enough scientific backing to say that?
It sounds like the appeal is NOT like that, the judge having seemingly ignored the very reasonable challenge to the original witness testimony.
There ceased to be a distinction between the two groups in your original comment when the weight of evidence started to clearly tip away from prosecutions like these.