Alabama's line, running backs, receiving corp, and tight ends are, as a unit, significantly superior to Louisville's. If Jalen Hurts had been put in as the Louisville starting quarterback, I would have bet dollars to dimes that he wouldn't have nearly as good of a statistical record as Jackson did.
Put Lamar Jackson at the helm with Alabama's supporting cast in 2017, and he would have had an outstanding year.
Again, the NFL scouts know this, and aren't blinded by the statistics.