On a visceral level, I think Hereditary understands trauma quite well. Or at least one articulation of it. Have other horror films portrayed it better or with more nuance. Undoubtedly. Something like Lake Mungo is always going to win this battle. But there is more to show about trauma beyond the quiet despair that makes up the bulk of it. Hereditary is an honest depiction of the anger and confusion that are also a part of the experience.
The visceral articulation is not in question. I agree that Aster is quite capable of this. What is in question would be the purpose of conjuring these primal pains. I'm not someone who feels that horror films are emotionally mechanical machines intended to regulate our adreneline in thrilling patterns, not a genre limited to touching nerves, but instead a genre which is equipt to excavate and extricate the layers of tissue beneath the reflexes. Aster can certainly articulate trauma convincingly, but what does this reveal about our nature? Most would say that this isn't the horror genre's concern, except that much of the genre is embedded with traumatic archetypes, the classic monsters being avatars of primal impulses, etc. Aster feigns depth by occult reference, the obscurity providing the shadow, but what are his films saying about psychological process, coping, projection, the rest of it. This is not foreign subject matter for the genre, but it does tend to be relegated to subtext. I think Aster might be halfway there.
Now does this have anything to do with Aster's actual experiences? I can't possibly know. You could be right in saying he an emotional tourist, but if that is the case, he is at least a canny enough artist to put a hysterical version of grief on screen that resonates with me. Do I think it is a great enough work to deflect any criticism of this? As I've already mentioned, not at all. But I'm just using this particular movie as a trojan horse to make the argument that dwelling in the heart of misery can have lots of different virtues in filmmaking. Dealing with any kind of extremes can.
I also like Aster's films, and don't want to come off as if I don't appreciate his talents, but I think I can answer some of these things better in the following response...
To Janson's point it's likely that he's not pulling from real experience here, but I guess I find his use of the horror genre as an exploratory tool in this respect engaging enough to compensate.*
I don't mean to say that it's necessary for Aster to experience emotional trauma to depict it. But I don't like using the horror genre as an excuse to not go deeper, as we've seen many horror films that have adequetely respected the depth of trauma, from
Caligari to
Don't Look Now to
Cure. I don't want to see trauma used as pavlovian stimulation without some consideration of how we process it, and this is where the third acts of Aster's films flail for me.