Football is not the same thing. It is different from our real world. Do you really believe this article? Do you think that Bledsoe or any other QB who has been a starter in the league for many years would just retire because he got benched during the season? Nothing in Bledsoe's history shows him to be this type of guy.
There would be quite a few people who would accept a demotion because they would have no other choice. Why would you as a manager not expect loyalty from an employee you demoted? Employees have to work up to a certain standard to maintain their position. If they aren't doing that, then they should expect to be demoted or fired. That is part of the real world. If they think their employer is not being loyal for demoting or firing them, then they got problems.