Blame sociological issues you don't understand all you like. You don't know what you're talking about, and I think you're wrong.
See, that doesn't really get us anywhere.
I don't think it's a chicken-egg or either-or problem. I think you could describe a very complex set of societal changes. But 100% of us experience that and not 100% of us go commit mass shooting (see the flaw in your earlier logic?).
I think societal changes play a role, but that overprescription of meds is one problematic result of a whole host of interrelated societal changes; and that side effects in some individuals as a primary contributor in mass school shootings warrants investigation.
I think you want to take an extremely complex and probably multifactorial issue and point to a convenient scapegoat. But hey, what do I know, right? Not like I deal with this **** every day or anything. lol