When I take my dog for a walk, he finds the biggest stick he can, whether or not he can carry it.
When I was in high school I knew a kid that loved Braveheart so much he got a reproduction of the claymore, a sword that was easily ten inches taller than him.
I think some dudes, no matter the species, just like the big pointy stick.
Makes a lot of sense with larger creatures with tougher hides. Could they be big enough that 2 people would use it together? Wouldn't it be more probable the people at the time were smaller than us now?
Why couldn't they just have tied a stick to the axe? Is it just a handaxe because people didn't do real axes yet, or another reason? Seems occam's razor that if you can't hold it it wasn't held like that.