Why isn't Reddit singing? Several possible reasons:

1. Most published research findings are false. - this sort of problem makes people wary of new research.

2. Preventing and curing diseases is bad for business if you're in the medical industry. However, average people look to doctors to tell them what's real and what's not. It may be that doctors aren't spreading the word very fast, or are downplaying the message because of perverse incentives.

3. They may be prone to overconfident pessimism.