What you're saying is quite making sense anymore.
If they're not using quantum mechanics to prove anything, if they're only metaphors, then why do they keep talking about quantum mechanics? You could find a billion better metaphors for their ideas.
In fact, plenty of New Age cults DO use quantum mechanics to justify their beliefs. They don't say that quantum mechanics work like X, so maybe the soul works like X as well. They say quantum mechanics works like X AND THAT'S WHY WE CAN INFLUENCE PHYSICAL REALITY WITH OUR MINDS. They say that. All the time. It is not a metaphor or a parallel. It is outright saying quantum mechanics justifies my insane, poorly thought out beliefs. The fact that quantum mechanics are really weird and often counter-intuitive only helps.
In that short review of What the Bleep do we Know I posted there are many examples. A lot of New Age stuff is based on the idea that we can change the physical world with our thoughts, and they base this on the idea that observers in quantum physics change variables in the things they're observing, without ever understanding what that actually means.