Labrador has aggressive black bears too as does some island. Likely due to not being hunted much or at all, and becoming used to folks like you mentioned.
Bears will also get aggressive when food is scarce and they are starving, or if they are old and can’t hunt like,they used to, or are sick. Most bears are cautious, but in those 4 cases they lose their sense of caution, and become aggressive out of necessity, but it usually goes agaisnt their nature to do so
It is “against their nature” because hundreds of generations of bears were selected, so those who feared people survived much better than those who did not.