No, it was because they were jerks who lacked any sense of honor.
Look, there is NO excuse for screwing your subordinate's spouse.
The balance of power is so far off that is tantamount to rape.
The person at the bottom of the power structure can do nothing about it.
Think President and intern, police officer and a suspect, teacher and student, all relationships that are have such a skewed power dynamic that people on hearing about them know instinctively that they are wrong on any number of levels.
The problem arises when one person in the mix decides to make a spectacle of it for public consumption, out of vindictiveness or other selfish motives.
No, the problem is SCREWING YOUR BROTHER OFFICER'S WIFE WHEN HE CAN DO NOTHING ABOUT IT.
I am not sure how many ways I can say that.
It is a disgrace to you, your position, your military, your family, heck your species.
You obviously are generalizing from one situation.
Sometimes people possess various values of ‘honor’.
And you don’t know that anyone even desired to do anything about it in this particular case; it may have been all agreed-upon, in which case there’s no harm and no foul, and most concerned just wanted to keep it on the ‘down low’.
Again, this was not the US, and it was not a typical or general situation. It may offend your personal ethics, but unless you know all of the actual details, you’re just spouting your own philosophy and demanding that it prevail in every circumstance.
As King David discovered.