I think this could also be a classic cause of correlation but not causation.

Of course people who're likely to commit mass shootings likely had some sort of dealings with psychiatrists and perhaps were on drugs. It's not necessarily that the drugs cause it but rather it's the underlying psychological issues that causes the violence and the drugs are due to this psychological issue.

It could warrant some additional looking into though.

In any case, I do believe most mass shooters have underlying issues that led to the shooting and society should look to address those issues. The deep state doesn't want to admit there's any cultural issues and the deep state this censors shooters under the grounds of not giving killers a medium for communication or it'll encourage more shooters but I think the lack of social awareness to the likely linked social issues these shooters have make these shooters feel alone and that leads to more shooting by other shooters.

There are huge social and cultural issues in society right now that we're ignoring and I do believe this is on purpose because the deep state knows it is the root cause of the problem and doesn't want people aware of it.