Oh, I’m not making a claim that it proves PWT. Simply that it’s evidence that supports it. Both positions are metaphysical claims that cannot be observed. So both can only be inferred by supporting evidence. And I would say that only PWT has observable evidence to support it.
Whereas, as far as I know, the other interpretations don’t at all correspond to observable reality. The idea that momentum and position of quantum objects do not exist independent of measurement is purely a verificationists interpretation.
And just to clarify, as far as I know, the predictions in question are concerning the formulas associated with the interpretation/explanation. They are support for the description, i.e., the formulas, not the interpretations.