That's probably pretty well accounted for in Lego Group's design and marketing philosophy. They have a vested interest in getting bricks "locked up" in creatio

That's probably pretty well accounted for in Lego Group's design and marketing philosophy. They have a vested interest in getting bricks "locked up" in creations that are too cool to take apart. Once you've done that, how do you build something else? Buy more Lego sets, of course!