In a universe where efverythingf is forever, energy and matter just take new forms never truly destroyed...
Why the fuck is conciousness the exception
Edit: That's a serious question, and the only answer I can think of is "It isn't, we just don't know how to find conciousness when it leaves the body. Much as ancient main did not know of radiation nor how to find it, so he believed radioactive springs were cursed or blessed."