In the hospital environment, power is partly conveyed by the clothes people where and if you do not conform or obey, then you are punished. It is a pattern we are conditioned into from nursery/kindergarten onwards.
Authority provides the illusion of a sense of control, predictability, certainty and orderliness, and it's like we gravitate toward that even when it leads to bad outcomes for us.
For most of us the fear of being out of control seems to be greater than the fear of being controlled.