Not necessarily. If you are dead and your account remains inactive for a while it will eventually be closed. You have to remain an active member of the community, publishing hubs, asking and answering questions, active in the forums to keep your author score going. When you Author score drops to below zero then your hubs are no more.
There have been members whose accounts were automatically closed for lack of activity.
Also, this is technology, who to say some very powerful virus won't wipe us all out (meaning all our hubs)?