It seems like an odd approach, but it could explain consciousness better since it assumes that each measured outcome is private information of the observer and

It seems like an odd approach, but it could explain consciousness better since it assumes that each measured outcome is private information of the observer and each observer makes up the difference in regards to having differently measured outcomes. But there's something troubling about that for me. Does it mean when someone measured the health of Christopher Lee he didn't die? But for another observer who watched his vitals he did die? Are they in the same world? Or does this require the many world's interpretation to remain intact? I hope I'm not stretching QBism beyond its intended goals, but that's the sort of conclusion I can see being made from it.