Leadership on the football field is delegated from the Head Coach. Jerry Dumbo GM Jones does not want a leader at Head Coach. Because he cannot get the glory when it is given to the Head Coach and QB. The Head Coach delegates leadership to the QB and then other team members. This was consistent with Tom Landry, Jimmy Johnson, and briefly with Bill Parcells.
So you cannot blame Dak, who is a natural leader as confirmed at Miss St. and with teammates in high school, college, and the NFL. However, there is no HC that can delegate his leadership authority, accountability and responsibility that has worked for Jerry Jones. Because Jerry is owner, GM, and defacto HC. He hires a coach of offense, defense, and does not want a "walk around" HC that walks in his authority as leader of the football team.