This is an indictment of all that is wrong with the Cowboys organization. This is a team sport; players are expected to be prepared, both mentally and physically, so that they are able to perform their jobs and play within the system; holding each other accountable in the process.
And the coaches are responsible for developing a scheme that caters to the team’s strengths; putting players in positions that fit their individual skill sets and develop those skills as the season progresses.
If there is strong leadership, communicating a clear message and holding each other accountable to maintain a standard of play, there is no need for a players-only meeting.