That is an often repeated but false and downright stupid saying.

People are not who they truly are when drunk.

If someone is going through a tough time they might act out when drunk, and deeply regret it the next day because they acted exactly how they are not.

Or someone might be going through a great time and revel a bit too much and in ways they would normally not. And again feel great shame and regret the day after.

Anyone that’s been really drunk has done stupid shit. That stupid shit definitely doesn’t define who they are.

It’s such a nonsense. Imagine telling every alcoholic that has gotten sober that they are defined by all the fucked up shit they did when drunk and that’s who they really are.