A 133 fold increase hardly seems trivial. It sounds more like putting a handle on the axe was a key technology that put humans close to the apex of the food chain. Even if our prey animals didn't much change, it was a major change to our own status as prey.
Imagine if spears improved hunting success rate by 50%. What do you do with that extra time? Maybe you take up painting, sporting, music making, etc. Maybe you venture further out into the wilds and succeed across a broader terrain (no longer reliant on savannas alone for success).
Maybe your spear technology and additional leisure time leads you to discover other uses for woodworking, etc. Maybe a few hundred thousand years of that (including sexual selection) leads to evolutionary improvements in brain power.
Even in the modern era with high powered rifles, Cape Buffalo are still considered dangerous. I would not want to be anywhere near one with armed only with a spear.
Given that, a 100-fold increase in how much is hunted after spears are introduced, seems like a huge difference.
But this article made me realize that it might be just preprogrammed in some of us, a legacy of the long forgotten ages when our forefathers regularly faced a ton of galloping angry beef with just spears. Possibly the tribes that would not even try died out from lack of food.
If that is something you're interested in, you would probably enjoy reading Ernst Jünger's Storm of Steel. Make sure to read the 1929 version. I believe there is only one english translation, by Basil Creighton.
All the other editions available in the market are subsequent edits the author made, each one with a more pacifist tone, as the author got older.
This makes sense phylogeneticly. Chimpanzees also hunt prey of various sizes.