Almost all of the whining I have read about alignment comes from people with weak imagination and a poor grasp of the concepts of morality and law. Alignment is an essential ingredient in treating those issues in a role-playing setting. Of course it's simpler and easier to just delete all the components that you find confusing and difficult to implement, but that also makes it extremely boring. D&D is a template that requires players to bring their own knowledge and creativity to make it work, and you have to also find some decently intelligent people to play it with. Some people may not have access to those kind of resources.
