Comics have been soing the same thing for 70 years.
I dont see what the big deal is. The big deal is she died. Not that she is dead.
Not sure if you ever died but its really traumatic, and not just for you. No one is going to be ok with dying juat because it doesnt stick. It hurts, its violating it takes power from you and it stresses out your loved ones. And thata still only if u know you CAN come back