Tragedies usually have
so many causes that it's impossible to point out a single cause in a 3-paragraph comment and have it mean anything.
Usually, if you do a root cause analysis of anything, you come up with so many contributing factors that the resulting document is hundreds of pages long. Think of industrial postmortems or court proceedings. Everything is more complicated than it seems at first.
Saying "This was because she was denied tenure" does a disservice to everyone involved. It was probably partly because she was denied tenure. It was probably partly also because she had easy access to guns, and she was super focused on her research, and she didn't get along with the school administration, and she had once accidentally killed her brother, and plenty of other factors that we could never know about.