In the recent thread on horsedrawn vehicle I didn't mention why metal carts are so unpopular. In a wreck the metal shafts will bend and often impale the horse.
A wooden shaft is more likely to shatter, or 'all to shiver' like the jousting lances in Mallory's King Arthur.
I assure you, a good sized bear will bend the fanciest aircraft grade hollow pole.
Anyone who has skinned bears knows there is actually a smaller animal under very loose hide and fat. Penetration demands a very stout thrusting spear, aka Anthony Hopkins v s Bart.
These elaborate hiking sticks, and there have been others, are just hollowhandled survival knives.