> All metaphysical positions are ultimately unfalsifiable

This is not true, there are many metaphysical positions that are falsifiable.

For example, "anything shaped like an apple is an apple" is a metaphysical position. It defines what it means to be apple-ish. You could hold that metaphysical position and also "apples are always made of plant material" as another position you hold at the same time.

Then you could falsify the metaphysical position by presenting a stone carved into the shape of an apple. You could choose to deny reality and change your physical definition (what the definition of the word "apple" is), but if you think logically the evidence constructively falsifies the original metaphysical position.

I think what you might have been trying to say is that people tend to adopt metaphysical positions which are non-falsifiable. Yes, they do, but that doesn't mean no metaphysical arguments can be resolved through logic and experiment.