There is a black box warning on SSRIs stating that it may increase suicidal and homicidal ideation. Even if rare and only impacts 0.2% of people who take them, if you put a million people on them that’s still 2000 lunatics. 10 million that’s 20,000 lunatics.
I mean the author’s claim that “most” mass shooters aren’t on an SSRI doesn’t mean that children on an SSRI aren’t more likely to commit mass shooting than those who aren’t.
She’s using a logical fallacy.