Until you've seen friends or family with healthy, upbeat outlooks, good minds, families and careers deliberately choose alcohol or crack because it made them feel cooler, and then destroyed their lives - don't talk to me about "disease" please. Cancer is not a choice; that first bottle of vodka or puff on the pipe is. Being part of the "drug culture" as one friend put it can be very attractive when you're seeking an identity that makes you imagine you look cool. Yes, some people treat depression with intoxication, which is obviously a bad choice, but that's not every addict. Nuff said.
Just to precise that it’s insidious: I didn’t choose deliberately one day that I would become alcoholic and drink until my life would be a mess. However, like you said, you’re in control, not the case with cancer or other severe illness.
I also think that drinking a bit too much is something tolerated in our societies. It is, IMHO, as dangerous as any hard drugs (coke, heroin, fentanyl, etc…).
I had four phases in my substance abuse life:
- cannabis, from 16 to around 24.
- Alcohol entered the mix at 18-19.
- a long hiatus of 15 years with no pot and normal use of alcohol, from 24 to 39-40.
- the real drop with alcohol from 40 to 47 where I almost lost my girlfriend until my mother and father had a serious discussion with me. That was the last time I drank, more than three years ago.
Personal opinion again but I had no troubles quitting smoking pot (and I smoked way too much too…) compared to alcohol. Never lost control under cannabis neither and yes, I had moments where I smoked insane amounts of hash or pot…
I don’t pretend that it’s good to smoke too much, particularly when our brain is still in development in the 16 - 25 range.
These days, I don’t smoke cannabis anymore as it makes me paranoid and it’s not a good mix with anti depressant

A sequel of my younger days, unfortunately!
Fortunately, never been tempted by any other hard drugs as I knew it would be a deadly spiral for me.