Upload & Sell: Off
If the MTF curves are great, and the durability is there, who cares? It is price for value. I love mine a lot.
Also, I'm not trusting my $1400 lens to a $40 knock-off anything. I'm not a guy who spends money for the sake of money (or brand), but there are certain places where I think it is kind of crazy to cheap out (batteries, memory cards and certainly something that keeps an expensive piece of glass and my body from falling from a height...)
Your logic would work if Nikon didn't have a thorough history of providing godawful telephoto lens collars/feet. In many cases, you're far more likely to lose your lens to the ground by NOT replacing them with third party options.
That said, I'll stick with RRS or Kirk products, partly because I use Arca Swiss clamps everywhere, partly because their products have, in my experience, been very good. Trust is a big problem with photography accessories.