Most predatory black bear attacks on humans are carried out by bears under 200 lbs.. At that size they are young and haven’t learned the appropriate target species. It may be their first year on their own. They are often hungry or even starving because larger bears are out competing them. By the time a bear is large he pretty much knows his way around humans and generally has no malicious intent. Of course, he may well be attracted by an easy meal if you have food smells around and, if so, he will defend his meal once he claims it.

But carrying bear spray is basic common sense.