Drinking is a disorder, not murder. The Bible is very clear about the difference.
A sin is defined as "an act that defies a moral rule". Over imbibing in drink certainly covers that, even though it is not punishable by death.
Sin comes in when those who wish desire a relationship with a spiritual entity that requires a certain lifestyle standard. Living within that standard promotes well being, and acting outside those standards creates a healthy guilt that helps the follower to change their life to conform.
Continued acting out creates a "numbness" that hardens the follower to a life of slavery to sin, acting without morals in this regard.
Sin has a proper place in reminding us that the struggle to live a moral existence is difficult and needs constant monitoring. Sin is an integral part of searching for a higher power. It is part of a system designed to reconcile man and God.
Very often, sufferers of traumatic events will "act out" by abusing coping mechanisms that are "under the radar". These can ultimately come out as being abused, i.e., car accident.
Ultimately, God wants us to be with him, to share in his perfection, to learn a proven moral code and be filled peace. Sin is the opposite of blessing, but adhering to a higher power, and changing our paths when we encounter sin, can lead to a life filled with blessings, children, good health, freedom from wickedness.
Can a person have those "blessings" without following a God? Sure, there a many examples of those who do not recognize God as a source of guidance in their lives, and they live by a moral code that does not include sin as guilt, and the benefits of following a moral code as a blessing.
Personally, I went to a retreat where there were many traditions and ceremonies I felt were unnecessary and overbearing, I was certainly overloaded by the experience. However, after careful reflection, I found these to be enlightening and of value.
The ceremonies work to reinforce the desire of the follower to a course of life that he wishes, serving a God certainly can have positive results on a lifestyle, instead of one's own moral compass, that can be marginalized by abuse and rationalization.
A guide is just a guide, a sin is just a sin, my dear friend. Sin can be removed, and the journey continued as easily as a blessing bestowed. To the latter, the Happy God I serve searches me out and seeks to reward me, personally. When I sin, I work diligently to correct it, to get back to a guilt free life, and the blessings, as I believe it, from God, and ultimately, from adherence to a good moral code.