Ethanol is a naturally occurring substance, humans and many animals have specifically evolved ways of processing it. In moderate doses it does no harm.

It's almost impossible to avoid ingesting some alcohol during the course of a natural diet, and that includes if you avoid fermented food such as bread, let alone beverages deliberately brewed to be alcoholic.

Isn't the problem of poisoning caused by Methanol and not Ethanol?

Gemini says this:

"Ethanol is the type of alcohol found in alcoholic beverages (beer, wine, spirits) meant for consumption. While ethanol is safe for moderate consumption, methanol is extremely toxic and can cause poisoning, blindness, or death, even in small amounts."