That's an interesting point. I would note that a quantum possibility is not necessary equivalent to the metaphysical concept of 'spirit', but acknowledging a sub-empirical level of reality opens the door to a consideration of whether QM provides some scientifically grounded gateway into the non-material realm including mental substance and possibly spirit (if that is considered distinct from mental substance, which is of coures another question). I'm currently writing a popular book on my interpretation, which will include a look at these fascinating metaphysical issues.