You’re drawing a philisophical distinction based on a particular ontology of the wavefunction. As simpler version arises in classical electromagnetism: we can integrate out the charges and describe the world entirely as an evolving state of the E&M field with the charges acting as weird source terms, or we can do the opposite and integrate out the E&M field to get a theory of charges moving with weird force laws. These are all equivalent descriptions in that they are observationally indistinguishable.
You’re drawing a philisophical distinction based on a particular ontology of the wavefunction. As simpler version arises in classical electromagnetism: we can integrate out the charges and describe the world entirely as an evolving state of the E&M field with the charges acting as weird source terms, or we can do the opposite and integrate out the E&M field to get a theory of charges moving with weird force laws. These are all equivalent descriptions in that they are observationally indistinguishable.