I think so to. They refurbish electronics all the time, a little dent would probably be nothing for them to fix. If it were me if it works why fix it? I wouldnt worry about it. Before you know it they will come out with something else thats better then what you got and you will be replacing it anyway.
But some people like to keep things looking good so I guess if I were like that then I would want to get it fixed to. I guess to that if you wanted to ever sell it you would get more money out of it, if the dent were fixed so yeah I can see why your brother would want to get it fixed.