Heh. You must be new, eh? Bought the marketing, and bought the machine? It's really just a computer. New models (and old models) occasionally have flaws and problems. Do you think Apple has a well-stocked refurb page because they're constantly swapping out employee computers?
No, I owned an iBook G4 which was rock solid and never failed on me. Computers (especially the MacPro) are a tool which people use to get work done. If I go down to Home Depot and buy myself a set of power tools, I expect that they work and don't fail on me, or I'll tell them to shove it up their ass and return them. These are all tools people are using to get a job done, and they need them to work.
Furthermore, I understand that ALL companies will have refurbs. But to me having refurbs doesn't reflect returns from customers, it reflects quality control, that after it came off the assembly line it just wasn't up to spec, and so they had fix things before it met their standards.