Go work nights in an Emergency Room for a while and you'll get a pretty good idea of what the downside to drug and alcohol abuse look like.
If you drink to "escape" you're headed for trouble --- it's an unrealistic expectation of what alcohol can do for you.
If you occasionallyhave a couple drinks to "take the edge off" you'll probably be ok.
IMO alcohol is one of the greatest evils. I come from a family where both of my parents, my sister and my brother were/are alcoholics, functional alcoholics but drunks none the less. It is sad what it does to you.
Yeah, I can second that. That said, and as a practitioner of long term sobriety, I think compulsion is, if not blessed, at least sanctioned by evolution. Think about it. I differ in that I don't call alcohol, or any inanimate substance or object, evil. It's all about how it is used.
As for the op's question, though, my thinking, based on observing any number of what I'd call "lightweights" and what the rest would call normal/healthy drinkers, is that people who don't have a problem don't question their own behavior w/r alcohol. I.e., it's kind of like the price of that Lamborghini ... If you have to ask...