Six percent of people think they can beat a grizzly bear

Eeyore said
If I remember correctly, it's believed that humans are a big reason for their extinction. Not for food, but for self-preservation.

I'm too lazy to check on that though.

Humans did play a role along with smaller species like the brown bear. They competed for the same food sources.
We have intelligence on our side. 12 humans armed with spears was a formidable opponent.