"Sir, we have reports of another rogue Admiral"Given how many Evil Admirals Starfleet has, they probably figure one who's only real crime is going AWOL is worth keeping. After all, he's not plotting a coup, in league with an enemy power, conspiring to derail peace initiatives or any of the other activities we know other Admirals get mixed up in.
"What are they up to? Coup attempts? Aiding the enemy? Wishing to impose a dictatorship?"
"Um, no sir... he's refusing to leave the resort spa"
"...We'll just overlook this one"