And how do you know that the weather didn't cause the plane crash and the fact that the pilot has smoked marijuana in the past few days had nothing to do with the crash?
Planes crash all the time due to bad weather.
Checking the NTSB report for this accident showed that visual meteorological conditions prevailed at the time of this accident.
How do you know that the fact that this person was a cronic drug abuser didn't have something to do with his accident?
How do you know that a non-abuser would have saved the lives of the passengers?