I have my own thoughts about regimented prescriptions - sleep x hours a day, drink y glasses of water, eat x:y:z ratio of carbs, proteins, and fats, etc., as though human bodies are machines that fit into a single rule.
That said, I still personally adhere to some of these because, in our urban ways of life, we are kind of out of tune with our bodies (even a lot of spiritual practices taught are not body-inclusive aka ignore the body), and till a certain level of listening skills develop, better to fake it. I prefer a sense of perceived order within chaos than chaos within chaos haha…