My drinking ran in cycles. I'd have long periods of "normal" drinking and a few stretches of sobriety that lasted up to a year after a particularly bad self-detox.
If I go back 21 years I had just gone through grad school, which was my first patch of serious binge drinking (from 30 to 32). I was in a period of relatively "normal" drinking. If I'd quit then I never would have had the horrible periods which really didn't start until a few years later.
So...you may have dodged a bullet, and been more of an alcoholic than you realize.
REmember the key word to "I've never had a DUI, or been homeless, or lost a job..." Yet.
Alcoholics come in all shapes and sizes...and the disease changes over time, usually worsening.