As someone who does Ramadan right now, I partly disagree. You are right that not drinking has adverse effects on cognitive performance, at least in the initial

As someone who does Ramadan right now, I partly disagree. You are right that not drinking has adverse effects on cognitive performance, at least in the initial days. But remember that this fast is done for mental reasons, and not physique. Even though it can be difficult, I really look forward to it throughout the year. It does bring euphoria and increased focus and other positive "mental" effects. To say it has no benefits is obviously wrong. It can be a great experience!