If it weren't for the fact the burglar got charge with a weapons offence, I'd be inclined to agree. That bar of "reasonable" should go pretty high when someone's in your house with a weapon. Now who knows what it was, and maybe the homeowner did beat him after he wasn't a threat anymore.
I probably wouldn't go around "guaranteeing" anything. I just hope the definition of reasonable matches the circumstances because there's a reason people in Canada don't think you have a right to self-defence, as they've recently updated the self-defence laws because of murkiness, and it's still not clear.