This is what happens when you confuse technical complexity with product success. A complex product, or one that takes "more than a weekend to build" will not necessarily be successful, and a simple product will similarly not necessarily be successful.

It has much more to do with demand. The wheel isn't terribly complex, nor is it original. Yet, if I came out today and started selling wheels, I could probably sell a few thousand. There's a demand for wheels, and so it makes sense to sell them. I think that in this age we forget this part of the equation way too often.