The sudden departure of General David Petraeus from the CIA probably tells us more about the state of our nation than it does about Petraeus. President Barack Obama should not have accepted his resignation.

We now seem to care more about the sex lives of our leaders than the real lives of our soldiers. We had years of failed generalship in Iraq, for example, yet left those commanders in place. Petraeus’s departure again demonstrates we are strict about intimate behavior, but extraordinarily lax about professional incompetence.

“A private who loses a rifle suffers far greater consequences than a general who loses a war,” Lieutenant Colonel Paul Yingling wrote in the Armed Forces Journal in 2007.

Americans severely judge some forms of private behavior between consenting adults, if one party is a public official. Yet we often resist weighing the professional competence of such officials ‑ even when they clearly are not doing a good job.

This is not, as some say, because we are a puritanical nation. Rather, our standards have changed in recent decades ‑ and not for the better.