I dont want to argue but i still you dont grasp that both are useful in their own way, since you are not alone in a planet, which by the way is another made up scenario by your own brain trying to fuck you up

The question is not which one do you pick because is more useful in the vacumm to survive on earth alone

Lets forget about the blade. You have a small house in the city and you have 100 axes already in your house. I offer you an old one for free. Do you still pick it up?

Its the same axe you would had wanted in your island alone. Why you dont want it now?

Context matter and both are useful in their own way. My escenario is as made up as your alone in an island one

If we restrict this to realistic scenarios, I would argue that practically nobody has found themselves alone stranded in an island and at least 20% of the population shave every day

This is probably an useless argument because you still think that the axe is always better no matter what and its a shame, because you are discarding the blade every time and makeing blades feel bad, but in reality if a surgeon has to cut me, i rather he is very good with his blade even if he has never touched an axe