Ok seems like I need to explain myself.
Before everything I want to say I'm not a fan of Harmon. I'm not white-knighting him. I was just disappointed that something I liked came from someone so gross. Like finding your favorite YouTuber has a lolcow thread...
First I'm not saying Harmon invented the Hero's Journey. Nor that all stories should be Hero's journeys. Though, I would say that most great stories are just a variation of it, and most stories overall are... But I digress.
I only said that Harmon's distillation of it for story outlines is actually pretty good and I use it often for outlines with good results.
Second, I won't defend him, but myself by saying I'm not copying his style. His version is actually very broad and not a series of emotional moments to copy like other methods out there. Nor does it have all the steps Campbell's has (because that isn't for outlines, But I digress).
In a nutshell, his take on the Hero's journey is a simple "things are some way and x character tries to change it". I don't think that's formulaic at all given it has a huge room for interpretation there.
In fact the very reason I like it it's because it is so broad and not a series of very specific moments that have to happen so you can make a carbon copy of Star Wars.
Like this one for example (taken from change the cat):
View attachment 1158750
Now that is a mess worthy of a How to draw manga book.
Like others have said, Hartman didn't invent this. He just made it easy for outlines. That's what I'm crediting him with. If you want to do a Hero's journey his method is not bad at all.
What I'm using for outlines is, again, t
he super broad concept that a heroe's journey is about protagonists that tries to change things. Not the super-specific steps like "a mentor has to show, and supernatural aid comes", "there should be a tempress" etc, etc. I agree the later does make stories feel the same.
Look I agree this guy is an asshole, but I do suspect this one of the few reasons actual professionals bother with him, instead of just being a complete no-name failure like Dobson.