I don't know why people become alcoholics. My guess is they just like the way it makes them feel. A type of mood enhancer in a can/bottle.
Thinking some kind of miracle drug/herb can allow you to continue to drink heavily without causing life-threatening damage to your liver is just "snake oil" IMO.
Believe what you want, but I suggest you see a hepatologist if you have reason to suspect that you may have liver damage due to a lifetime of heavy drinking.
Their are blood tests that can indicate the state of your liver, but a better test is to undergo a liver biopsy. It is expensive, painful, and has some degree of risk (needle biopsy), or you can opt for a less painful, more expensive and more risky (TJI - which runs a catheter down your jugular vein), but it is the only definitive way to verify the state of your liver.
At any rate, cutting out all alcohol intake is the easiest and most sure way of preventing more liver damage.
Good luck,
RickThai