I haven't really cared for a backup camera either, until I started driving a cargo van for work. I have no rear visibility at all, so I need the camera and the side mirrors when backing that thing up.
But my Suburban, I've been driving that thing for the past 20 years now with no backup camera, and I can back it up with NO problem. I can usually get within a foot of whatever I am backing up to. If I towed a trailer more often, then I would probably want one for solo trailer hookup. But other than that, I would probably not use it often. When I drive my wife's Traverse I don't even look at the camera, I look at the mirrors when backing up because I am so used to driving my Suburban.