This diminishes what "random online comments" are. They aren't just text on a screen. They represent words that another human being has said about you. Often, words that will convince other human beings, who may take different actions or view you differently because of what they've been told, which will in turn spread virally and alter how thousands and thousands of humans see you and act towards you.

Humans are a social species. It is easy to say "just don't be social bro". When you are actually the victim of this behaviour, it is much less easy to shrug off. Having a bunch of people hate you and say horrible things about you hurts. That's not abnormal. That is perfectly normal. Is it good for your health? No, in the same way that somebody smoking next to me is not good for my health, but it's not my fault the person next to me is smoking. The blame rests with them. To some extent, yes, stepping away from the smoker is a short-term fix, although often an unpleasant one that impacts your quality of life in other ways (what if the restaraunt you like is full of smokers, what if the airport is full of smokers, etc). In the same way society eventually changed to discourage smoking around other people, we really, really need to change the culture around the internet, to recognise that the internet is actually a social environment, that there are real people on both sides of the screen. "Go touch grass" implies that the internet is not the real world, but it very much is, with real consequences, even if you can't see the other person.