No, you’re conflating two different concepts that share the term. Alcohol directly causes central nervous system depression, which is distinct from depressive disorder (aka depression) - the neurological condition. Regular alcohol use/abuse can lead to depressive disorder, but in an indirect way. CNS depressants (alcohol) actually increase GABA neurotransmitter activity, which slows brain activity. This effect on your nervous system has no known direct link to depressive disorder.