In a brief memo released on Monday (available here), Secretary of Defense James Mattis asserts that the burdens of the military justice system are worth the cost:
Time, inconvenience, or administrative burdens are no excuse for allowing substandard conduct to persist.
The military justice system is a powerful tool that preserves good order and discipline while protecting the civil rights of Service members. It is a commander’s duty to use it. Military leaders must not interfere with individual cases, but fairness to the accused does not prevent military officers from appropriately condemning and eradicating malignant behavior from our ranks. Leaders must be willing to choose the harder right over the easier wrong. Administrative actions should not be the default method to address illicit conduct simply because it is less burdensome than the military justice system. Leaders cannot be so risk-adverse that the lose their focus on forging disciplined troops ready to ferociously and ethically defeat our enemies on the battlefield.
(emphasis in original). That all assumes that the behavior at issue is actually improper – under both the facts of the case and the law – rather than merely subjectively undesirable.