I thought it was an interesting observation, though I don't necessarily agree with it. It made me think of the advice Christopher Vogler gives in his book about not thinking of the Monomyth as a step by step guide (if I remember correctly). Advice which I didn't really 'get' as much as I thought, until I saw the results of going against it for myself in my own tinkering with this structure as a gaming aid.
Anyway, much of my thoughts are in my reply to the fellow member, in the rest of this post. I hope these help.