As for your argument, the idea there aren’t many worlds requires an extra collapse postulate,
If you have realism about the evolution of state according to the Schroedinger equation, then you need an extra collapse postulate to avoid many worlds.. But you don’t have to have realism about state, so there are ways of avoiding many worlds without introducing collapse.
If you have realism about the evolution of state according to the Schroedinger equation, then you need an extra collapse postulate to avoid many worlds.. But you don’t have to have realism about state, so there are ways of avoiding many worlds without introducing collapse.
It would be very helpful if you would spell out these initialisms/acronyms.
Edited.