You dont have to worry about bears attacking.
There are numerous attacks every year by black bears in most of the provinces with black bears. I have no stats on quebec, but ontario has a number and bc certanly has quite a few.
I don't know what the population of black bears is in quebec (obviously smaller populations mean smaller chances of a problem). But i've heard recently that it's on the increase. Which isn't surprising, it seems to be on the increase everywhere else. When you get an increasing population there is often pressure on the younger bears, who may be a lot more aggressive than historically may be the case.
Hunting rifles usually make less than ideal bear defense guns. I wouldn't carry ANOTHER gun on top of my rifle if i were hunting, but it's not what i carry for hiking in bear territory. As i understand the post, he's looking for a gun to have when he's not hunting.
To suggest that black bear attacks are a myth is just out and out wrong. They mostly attack out of hunger tho and not usually out of 'aggression'. The problem with that is when they DO attack - they're playing for keeps.
Again i don't know the stats for quebec, but if you talk to the forestry services there are HUNDREDS of hostile bear encounters in bc every year. It's hard to believe that someone from BC would be suggesting that black bear attacks are a myth - I'll say straight out that you haven't done your homework.
Yes - the attacks are not frequent. 999 out of 1000 bears will swap ends and run. But that 1000th' bear is a real #####

Attacks do happen every single year in bc.
I've never had a serious injury in the woods, but i take a medkit. I've never gotten lost for more than a few minutes, but i use maps and gps or compas, and mark my trail. I've never had a house fire for that matter but i carry insurance.
It's not wise to over estimate the danger of bear attacks, it just makes you paranoid. But it would be foolhearty and possibly terminal to underestimate them. They happen. People are killed by black bears every year in bc, and many more are injured. That does not include the attacks where people successfully drive the bear off with firearms or spray, or other means.
Having said all that however, i will agree with you that keeping your wits about you and using your brain is still your number one defense.