That's outside my realm of experience.
I may believe is the falsehood if I wish, but my experience shows me that nothing is permanent. Perhaps only my death is, but I haven't experienced that yet.
Even someone else dying, while their death is permanent, the role they have in my life can be taken by another, so long as I remain open-minded and willing.
I’ve seen “temporary” last for years in my experience. But looking from the outside, we have a tendency to blame the sufferer.