I think it's a great reason to go and buy another gun!
Seriously, though - it's personal preference. Whether I hunt with my bow, shotgun, rimfires or centerfires... I rely on my spray (and the Almighty!) for the bear infestation.
Staying aware of the surroundings is key; and if possible, hunting with a buddy so you have more sets of eyes and ears, and they can carry some backup for you, whether spray, shotgun or lever action.