The real issue about incompetence in command is 'impunity.' Mostly no one sues anyone except the chief, and the folks in the exec staff are careful to have plausible deniability in each and every action and decision.

Incidentally, I found this too be pretty much true in the Philippine National Police, Indonesian National Police, Iraqi Ministry of the Interior, and nearly all of Bosnia & Herzegovina' 17 agencies, especially Republka Srpska. My hard-learned belief is that nearly all executive functions should be handled by civilian employees and be reviewed by utterly independent civilian boards with power to discipline all commissioned and civilian personnel from reprimand to termination. You'll find such results in far fewer disciplinary actions for petty rule violations and far more terminations for brutality and corruption.