Maybe he was a hut-to-hut salesman, peddling knapped flint tools, and he was robbed for his inventory; the thieves looked at the warranty failures he was carrying and left them.
Could be lol.
But seriously for a sec...
Tools made of wood, hide, self made glue and chipped rocks are gonna wear out a lot faster than today’s factory made, store bought stuff.
That such ancient tools would wear out to little more than marginally useful and had to be patch repaired multiple times before a trip ended really shouldn’t surprise anyone.