I mean alcohol is poison, we have consumed that substance for longer than we(globally) have been eating tomatoes, potatoes, coffee and refined sugar.

Multiple cultures around the world have independently invented some form of alcohol

And other species also routinely ingests poison for pleasure.

Dolphins getting high on pufferfish toxins, Elephants getting absolutely shit faced on fermented fruits such as amarula

Honey I don't know bout you but it's Friday night this human is absolutely gonna be enjoying some poison!