What are you arguing exactly... no one has an exceptional reaction to drinking that suggests a possible future problem, so I couldn't have seen one? alcohol has

What are you arguing exactly... no one has an exceptional reaction to drinking that suggests a possible future problem, so I couldn't have seen one? alcohol has the same effect on everyone? no one gets addicted? alcoholism doesn't have a genetic component? I observe someone undergoes a huge personality change after drinking and seems a lot happier. I get a sense that this person might have difficulty consuming in moderation. It seems consistent with a physiological or genetic basis. Not trying to win a prize in genetics or logic, just to use common sense to understand the human behavior I'm seeing. I guess it's also possible something our mothers did while pregnant made the difference. I believe Occam's Razor and the body of evidence point to a genetic basis. What do you think the evidence points to?