This to me sounds like it's a mechanism to cause one's mind to open up more, perhaps useful if one is dependant on alcohol to access a more open mind state and

This to me sounds like it's a mechanism to cause one's mind to open up more, perhaps useful if one is dependant on alcohol to access a more open mind state and critical thinking, however alcohol is a depressant and so it will actually depress thinking; I suppose it's possible there is insight to be gained by contrasting the more depressed state with the normal baseline.