It could be said that anyone who feels the need to drink 8 beers has an alcohol problem. But as to your question, St. John's Wort is an antidepressant, that's why you're taking it. It does other things, but the standardized version you're taking is usually used for depression. A true natural program wouldn't use just one herb and would look at your lifestyle, but the warning about alcohol use is precautionary just as it is when taking a pharmaceutical product. Whether it's natural or mixed up in a lab, if it affects brain neurotransmitters you're going to be cautioned to not drink alcohol or take other recreational drugs just for the safety of you and the manufacturer so you won't sue them.