You do not accept alcoholism as a disease. The medical expertise seems to accept it. Given the choice between believing what I can find of medical research and information+advice from governmental health organisations (not just US based ones) and something I read on a web forum, I decide to base my opinion on what the medical experts say.
You are of course welcome to have your view on stuff, but that doesn’t mean the entire internet agrees or have to agree with you. And given that there seems to be some sort of concensus on the matter among medical experts, you don’t get do idiot explain people that disagree with you. If you have weighty research in favour of your view, you’re of course welcome to present it.