Isn't this functionally the same as just saying "nobody's gonna go to a school and shoot random kids", though?

Like, yeah, no normal person would. That doesn't mean it can't happen, and, y'know, it clearly has. Yeah, if only a handful of people per year were told "you've got 12 months left to live unless you cough up a million bucks for treatment", I'd agree - but at the rates the US sees? At some point, someone who's broken enough to consider actually doing it is gonna get that news.

I wouldn't expect it to be a common occurrance, obviously, but the fact it hasn't happened even once is kinda weird.