"As I recall, Robinson Crusoe (based on Alexander Selkirk) stripped his ship of timbers, rigging, tools, weapons, rations, seeds, etc. He started out with many resources that most don't have."

Sailing ships of the time were quite self sufficient. There are many accounts of ships being virtually rebuilt from the keel up after they were beached on a remote island. The ships routinely had large reserves of materials and all the tools necessary to build or rebuild a ship from scratch.

An example for people wishing to be prepared for the worse. Ideally you should have all the tools necessary to rebuild a house without resort to external power and a good supply of materials. Back in the 20s and 30s many Florida residents kept hand tools and stacks of lumber under their houses.