Growing up, I was taught that the main reason why it's bad to drink is because it kills brain cells and brain cells don't grow back. Apparently that is not the case anymore:
https://www.scientificamerican.com/article/the-adult-brain-d...
https://www.scientificamerican.com/article/the-adult-brain-d...
(the famous rat experiment with the "stimulating environment" and brain grown was later attributed to the exercise wheel)
That's why haven't had a drink for the last 5 years