Sober for many years now, name changed for this.
Firstly, there's the question of how alcohol allows you to do more. Is it possible that alcohol disinhibits your exhaustion and gives you a false picture of what your body can do? In which case, there would probably be a reaction afterwards when you have done too much? That's been the case for anyone I've known with ME - they can push themselves to do more, but always pay a price for it.
If it's not that, and alcohol genuinely gives you more energy and there is no long term ill effect for you, you still need to be very wary of using it in this way. It's highly risky to rely on "high quantities every night", however useful it is.
Alcohol has an initial effect of acting as a stimulant but in the long term is a depressant. It creates dependency and most people find they need more and more to get the same effect. Even if it's not having a negative effect on you socially or emotionally, large quantities of alcohol will damage your body in many ways, including massively increasing your risk of quite a few cancers.
So virtually any alcoholic would tell you that however great the effects for you, and however much it helps you practically, relying on it to help you function in everyday life is a massive risk.
Most alcoholics start by using alcohol to deal with their problems then it ends up being the major problem.