re: Would the Cowboys have benefited from another owner buying the team in 1989?

I don’t understand why so many coaches want to be GM’s/player personnel directors too. Same with owners.

It’s a full time job to scout and evaluate hundreds/ of collegiate and professional players every year, to keep track of contracts of not just your team but every player in the league, and to manage your salary cap.

Has it not been proven that the most sustained success occurs when a HC is not the GM, but works extremely closely together to lay out exactly what the team needs to run the scheme the HC desires?