A good puzzle, it's a fair thing. Nobody is lying. It's very clear, and the problem depends just on you.
The problems of puzzles are very near the problems of life, our whole life is solving puzzles. If you are hungry, you have to find something to eat. But everyday problems are very mixed – they're not clear. The Cube's problem depends just on you. You can solve it independently. But to find happiness in life, you're not independent. That's the only big difference.
This website is mainly dedicated to puzzles. A puzzle is one of the most fascinating things in the world. This is both a way to have fun and learn something new. Even simple at first glance puzzles can hide something you do not know.
Puzzles are used not only as toys. Many of these are models of mathematical objects. Puzzles can be used in education (and they are).
Sliding tile puzzles are used in various researches. Search algorithms are compared on puzzles.
However, it is quite unfair to treat the puzzle as a mere tool in hands of the scientist or as a toy in hands of a child. The puzzle in itself deserves much more respect and attention.
After all, a good puzzle is a good way to relax. Why not?