Arming bears and saying we are invading their space is as silly a thing to say as it is to say that anyone who invades their domain deserves to be chewed on, killed and eaten by them. We all have the right to be in the wilderness to enjoy this earth as any living being, to include bears. Killing a bear with pure malice is stupid, but killing one in defense is survival and as realist as anything. If I want to share the great outdoors with my daughters on a fishing trip in the thickets to pass on a tradition and teach about natural history or whatever, meeting a bear along a creek bank is going to be something I'm willing to do, and if a grumbly bear takes me out in the process, he wins, but if I sink one in his melon, I win. Caution and respect should win the day and ususally does, but in a pinch I will save the day and kill any bear in defense that truly deserves it and not care that he is now dead, and I certainly won't care about what some "city dwelling only" person says or thinks about my doing so.
Enjoy the great outdoors and carry a magnum!
Best-MC