First off, I am no doctor. If you are really worried talk to one.
But I am an alcoholic. And I take an AA meeting into a local detox every week. Most of us, us being alcoholics, use the classic American detox, the toilette. We go through the sweats, the shakes, the sleeplessness, the anxiety of quitting without medical intervention.
That being said, some alcoholics do require medical attention while detoxing. It rarely happens, but people have died from quitting. It is usually someone who is drinking something like two quarts of Vodka or more every day for years.
Drying out for someone like that can be rough. But, you said you were putting down a sixer or so a night, I don’t think you will die if you stop.
A better question than “will it be safe for me to just stop??” is “how will I stay stopped?”
Quitting is easy, I have done it as much as twice in one day.
Staying stopped, now that is another question entirely.
Richard