I'd like to think for the same reasons you don't sweep your backpack for bugs that your employer has planted on you, or check under your desk for secret spy cam

I'd like to think for the same reasons you don't sweep your backpack for bugs that your employer has planted on you, or check under your desk for secret spy cameras. Unless your employer has some sort of reputation, I don't see why the default should be to believe that they are morally bankrupt enough to run some kind of therapist sting operation.