Good point. One is observable, reproducible and testable, the other faith based.
There are tens of thousands claiming to be messengers of God. I met several of them during my psych rotation at Sheppard Pratt hospital, in fact.
If their claims were consistent I might give them some weight, but they are not. A dozen prophets all making conflicting claims can't all be right.
How does one decide: gut feeling, or scientific investigation of testable facts? Only one of these approaches yields consistent, testable, reproducible results.