Alcohol is known to alter our perception of Reality and for this reason should be avoided.
Living under the influence of alcohol is like taking an anaesthetic and putting your hand into a boiling water. You don't even feel the damage.
In the case of alcohol intoxication the damage is not so much physical, but primarily in the domain of the Intellect and awareness. Remember that we "program" our consciousness ourselves.
Alcohol in moderate amounts is less dangerous than hallucinogenic drugs. It doesn't eject the Astral body (our consciousness) out of our physical body as many drugs do. Consciously perceived sensations are modified by alcohol intoxication, but these modifications are less extreme than in the case of drugs.