Caffeine is toxic at around 10 grams, which is 80-100 cups of coffee. I’d you’re defining “toxin” as triggering adverse effects at any dosage, then you need to include water, oxygen, and every other substance in existence.
Alcohol is a biological toxin at any dosage. I find that people who argue this point aren’t doing it from an academic standpoint but to justify their own behavior.
There’s unsubstantiated and nonsensical assumptions in your comment starting with assuming that anyone who doesn’t ingest alcohol does it to avoid exacerbating current health conditions, leading to those that drink moderately being healthier than those who don’t drink. That’s absurd.
I’ll make an assumption of my own. A significant portion of your identify and social life is in “moderate” drinking and you’re very keen to justify that as “healthy.”