My family has dealt with this curse for at least 3 generations that I know of. Al Anon for relatives of alcoholics, and Al A Teen for children of alcoholics are real life-savers and I highly recommend them.
This is an excellent suggestion.
OP: You say your brother is supposed to be a role model for you. It would be nice if our siblings would be another kind of parent for us, but as long as your brother abuses alcohol by choice, that isn’t going to happen. If he is an alcoholic, it may even be beyond what is in his power to do right now. As long as he relies on his own power, that is not going to change.
Al-Anon will help you sort out what, in living a life of love, you can and can’t realistically expect of yourself and your alcoholic loved one. It will give you role models for living your healthy life in the midst of someone who isn’t. I really encourage you to find a group near you.
As for whether alcohol were never invented…well, what would have been is what was. Changing the Constitution to outlaw it did not make it go away. It is something we have to deal with.
My own father and mother drink daily, except during Advent and Lent. I have never seen either one drunk*, and as far as I know, neither one has been. They are both over 70. I have an uncle and aunt, though, who are alcoholics. They have had to give it up entirely…but they did give it up, and of their own free will. Using alcohol responsibly, like using food or sexuality or power responsibly, is a choice. There is something that tempts all of us. Remember, too, that alcoholism and alcohol abuse are about much more than the alcohol. It is the lot of most alcoholics to compulsively try what won’t work until they finally get to a point that they realize it is time to run up the white flag and face the real problem that drives them into the arms of alcohol. If it weren’t alcohol, if your brother could not get that, it might well be something else, perhaps even something worse.
You’ll find all of this out if you get some help from people who have been through and who are going through something like what you are suffering. Don’t face this alone.
(*I have seen my mother drunk once. She has dementia now, and was at a function where alcohol was offered to her. No one thought to help her keep track of how much she had had, because we were not used to her recent lack of short-term memory and self-awareness preventing her from doing it herself. Her over-consumption was not her fault, but ours.)