Sometimes you have the luxury of multiple trustworthy parties having already each done a large sample size peer reviewed double blind study on just the question you want to know the answer to and have all come to the same conclusion.
Other times that hasn't happened yet and you still need to make a decision about what to do today, not after six months of further study.
Other times that hasn't happened yet and you still need to make a decision about what to do today, not after six months of further study.