Even if you respond to the idea of "losing control, it is more likely that you are internalizing it as "it is ok to pee right now" It is human nature to stay in control of things. Further, the urinary system is hard wired. up to about age 2 the brain plays no role. everything happens in the spinal cord. The external sphincter is not in play and the slightest push from the bladder muscles will cause urine flow. as you get older, the external sphincter takes on it's role as a normally tight muscle. you have to phyically relax it.
the internal bladder sphincter is controlled by the brain. But how is in my mind not well understood.
Do you really know how you pee? I don't.
sure we all get the urge, then the brain blocks the action until we are somewhere safe. then you must relax and go. But what really takes place. I contend that it is all somewhat of a mystery.
The ideal solution for many of us would be to return to the infant stage, that would be a true "no control" condition or automatic bladder. But this would seem impossible due to the hard wiring.
One thing I have found that may be effective to others is to accept that when you pee, you find it amazing and have know idea how it happens, it just happens. That it is very cool!
Since the very first urge you feel, is the same as the original spinal cord action in an infant, the perfection of this would be to pee the moment you feel that urge. But you need to pursuade the brain to "stay out of it!"
And I still think true bedwetting in an adult is just impossible because a whole part of the brain is dedicated to clamping the sphincters the moment you fall to sleep. I do not think hypnosis can undo harwired parts of the body.