We already know the null hypothesis (that there will be no change) is false. So the question here is about finding the cause of why the null hypothesis is false. Ruling out one category of explanations, and, in practice, assuming a different category of explanations, is bad science.
It’s also harmful. We know, for example, that south asians develop cardiac problems at lower BMIs than other groups. We know biology is a dominant factor in longevity: https://www.nytimes.com/2026/01/29/health/longevity-lifespan.... We need to follow these leads so we can give people the best medical advice. The possibility of bias isn’t an excuse. Doctors have an obligation to address medical differences that are real and exist while not succumbing to bias. You gotta walk and chew gum at the same time.
It’s also harmful. We know, for example, that south asians develop cardiac problems at lower BMIs than other groups. We know biology is a dominant factor in longevity: https://www.nytimes.com/2026/01/29/health/longevity-lifespan.... We need to follow these leads so we can give people the best medical advice. The possibility of bias isn’t an excuse. Doctors have an obligation to address medical differences that are real and exist while not succumbing to bias. You gotta walk and chew gum at the same time.