Sounds like some have not yet had their "bear experience." I had many until I learned to bag the food separately so that no odors transfer to the pack. Even though the food was in a secured cabin several hundred feet away, two grizzlies visited me not far from Lake Louise just to rummage through my pack while the other played a game of casting rod with my dome tent poles. A most happy moment while I was tiptoeing backwards was when they went toward the pack and tent, not toward me. Retreating to the cabin, a hiker from Scandinavia and I watched them from a distance, and the hiker said, "Oh, you have had the bear experience." All the hikers stayed packed in the cabin that night, afraid to go out the door which was being heavily scratched from the outside. Finally, someone could not hold it any longer, and it turned out it was wolverines, not gizzlies doing the scratching.
Also had a visit with the food hung and bagged in Maine in 1996, because was dumb enough to keep some blueberry flavored Kool-Aid in a bottle by the tent. Not much sleep that night. Noticed that the company stopped selling that flavor. It was good though.
Since 1999, have hiked mostly throughout Colorado with shelties, and have not seen any bears, even though I still hang up a cut down Ursack. Don't know if the shelties or Colorado are responsible.
Once you have had a good frightful bear experience, you won't be trifling with the bears no more.