My ancestors drank like champions. If anything, I'll bet sugar's worse for me than alcohol. Our food navigation system evolved around the natural world. If you trust your gut and eat exclusively natural foods, you'll be fine. Start eating processed foods and all bets are off. Better have good appetites, or discipline. Naturally occurring fructose is a signal that the food's not poison. Many seeds can survive a digestive tract and thrive in poop. Cooperation is competitive.