Historically, doctors used a bunch of scientifically invalid treatments. This was at the same time as the purge of proletariat medics and women healers (witch trials). With no alternative, we were at the mercy of whatever Doctors wanted to do.

Storytime: Ignaz Semmelweis was a doctor who discovered that washing hands saved lives. The medical authorities didnt appreciate it. Semmelweis was denounced, fired, kidnapped, tortured in a mental asylum, and beaten to death! This was 1865.

And if you wanna say it has changed, let me direct your attention to the fact that doctors are bribed to prescribe oxycodone. (source https://hsph.harvard.edu/news/opioids-doctors-prescriptions-payments/) which may have contributed to the opioid crisis.

So don’t trust somebody just because they have a lab coat and parents who paid their way through med school.