A homeowner would quite literally be charged if someone broke in and the assailant were to be injured. If a weapon were involved, it looks even worse for the homeowner. With ammo requiring a separate gun safe, it makes going for guns impractical. Doubly moreso if it's a clear display case as anything in there requires trigger guards.

Canadian laws are all about intent. If I go for my guns, since it I'd have to unlock two safes to load the guns, it could be argued that there was clear intent to do harm and that I would have had to put thought into it so the "Idk I panicked, I just reacted to the threat" defense counts for nothing.