That, and the fact they work.
I'm a gear head and have a big roll around box full of tools. Most of my wrenches and sockets are older Craftsman. Snap On tools are a lot more expensive than the Craftsman I have, but are they better? For what I do, no, for the guy making his living with them, probably. The added benefit of buying Craftsman tools when I did was that I could buy a lot more tools for the same money and more tools allows me to perform more tasks.
In my case the extra cost of Snap On tools adds no value over the cheaper Craftsman tools. I'm of the same opinion on "premium" copper bullets, the value isn't there for what I'd use them for. Heck, I don't drink starbucks either. LOL