I don't see the need on any of my centerfire guns. I have plenty of faith in myself that I won't monkey the scope up and if I do, I'll either reach into the back of the truck for another, get one from my buddies locker or go the hell home.
I sure don't have the years and miles of some of the REAL old codgers here but I've put in plenty of miles and days in my almost 40 years of scoped gun toting days and ain't had one go tits up yet.........on the other hand, I don't expect a Leupold to have a problem although it could happen.
Like you, I also think on most modern firearms it takes away from the esthetics.