Welcome to SR!
I have found that alcoholism is not so much about how much a person drinks or what type of alcohol they drink but what the alcohol does to them when they drink it. For example:
normal drinkers don't have black outs/brown outs/blank spots/etc..
" " don't wonder if they might be alcoholic
" " don't start planning their next drink while still at work or at play.
" " don't lose the ability to stick to just one or two drinks once they start drinking.
This list could go on and on but those are just a few of the things I can think of right now.
Personally, at the end of my drinking I was drinking two 30-packs of beer and a pint of 100 proof Hot Damn when I drank which was any time I was not at work. I could drink most any man or woman under the table. But I know of people who are alcoholics who would get drunk on a couple of glasses of wine.