They research it because the doctors can't be bothered with that even though it's their job. Why doctors aren't fired in masses is bewildering.

Got this issue with my doctors. They just don't care about me. They want to do as little work as possible. They refuse to read the papers I give them. They refuse to use effective medicines according to the research. They refuse to listen to me period. They're lazy sadistic assholes.

Finding a doctor that actually cares, works and fight to heal you is very difficult. As rare as unicorns.