I think _some_ people will want to continue to live, and some will not. Making confident assertions about someone else's future preferences seems fundamentally unreasonable.

I recall my grandmother in the hospital with pancreatitis, in serious pain, saying she was ready to die, but her doctors reassuring everyone that actually her situation probably wasn't life threatening. She was in her 90s already. She had outlived her husband by decades by that point. She had outlived multiple batches of friends at her retirement community. She did live for a few years after that incident, but I understand why she was ready to accept death.