At an early age is very harmful to drink, because the body has not yet fully formed. And in adulthood, alcohol does not have a very good effect on well-being. Although it depends on every organism, all people are different.
I don't encourage the consumption of alcohol by minors. But at the same time, it is ridiculous to move against the alcohol intake by the grownups. There are substances which are even more harmful than alcohol, such as sugar and common salt.
I disagree with you. Sugar and salt are not used in large numbers. You eat salty food? Or tea with 20 sugars drink? All the food in large quantities is harmful. About 30% of the world population suffer from overweight. But you must admit it is different.