A quick search will pull up several stories about police leaving their service weapons in restrooms. It happens, and their chain of command should reprimand them for it, but that may not change their behavior. Don't need to use it, but familiarity with the manual of arms to secure it is paramount in such a public place.
As for training- I look at it in the same vein as first aid: desperately useful for that one moment, but not otherwise.
Well, yeah! Politics will drive anyone mad, let alone an entire history of it. We love you all the same.