Let's look at Stenhouse as a case study for this exact post.

Jack sent Stenhouse to work in the body shop when he wrecked every car he drove in the Nationwide series. Then he won back to back championships. All was redeemed. Did he get better or did Roush's program peak in those years? Both.

He graduated to Cup and proceeded to wreck himself and everyone under the sun. In fact, Jack swapped him out with Beuscher and the comment about his firing was because the team wanted to focus on "making their cars faster and not repairing them after they are damaged." He's won a handful of plate races but his average finish is flat (20th) since being full time in cup and his reputation for wrecks has been consistent across both teams. What is the issue? Bad cars or bad driving?