I think my body is immune

So… I have a long history of alcohol abuse in my family. Five generations that I know of. We came from Norway, 50% and Switzerland, 50%. I’ve drank a fair amount since I was 16. I’m 42 now and every blood test I’ve had done says my liver and kidneys are healthier than my age. I don’t understand how. I’ve abused myself like crazy. Working in anything outside from -60 f to 150 f for about 14 years. Drinking daily. To the point I’m numb. Is this because of a long line of too much consumption. Or am I just healthy