Have a cite for that (that’s not reddit) ? Genuine question. I’ve heard people say this. But I was taught (by people with a lot of professional chemical knowledge and less professional distillation knowledge) that there is a small amount of methanol naturally in the booze being distilled. So as methanol and ethanol have different boiling points you can screw up and end up with dangerous quantities of methanol in the liquor.
I get that modern mass poisoning from liquor (e.g. the recent one in cambodia) is clearly from people adulterating booze with industrial alcohol, but that doesn’t mean it’s not possible to get dangerous quantities of methanol if you screw up distilling badly.