I've also struggled with the concept of being powerless over alcohol. I do have power over taking the first drink, but after that, alcohol has the power over me. I can't quit. I believe there's some sort of chemical trigger, maybe in the brain that kicks into gear after the first bit of alcohol enters my blood stream.
I don't think the bed and oversleeping is a good analogy. I've never managed to swallow my bed!
The psychological part of the power of alcohol is that "voice" which for me, years later still tells me, even the face of all evidence personally experienced, that I might some day drink again socially. I can't. Been there too many times to think it's an option for me.
You could be different. Some people are. This is just my personal experience.
Love,
Lenina