Easily answered, DURR. I think that we buy and build them because we have been pre-conditioned, since childhood, to accept what we are given. It's a Commy Plot and you know it.
Actually, it's a survival instinct born into modelers to keep them in a mode of refining and constantly improving thier skills. Economics also play a secondary, but very crucial, role. We are a generation used to instant gratification. Manufacturers ply this factor with release and delivery dates based on our payroll schedule.
Look at your own avitar. The Cabbage Patch Kid is happy. You look perturbed.
This reply was in jest. They do it for the kids that mow yards to buy a model. Comprende?