Is alignment really necessary?
For many people, no. For just as many others, yes. Alignment itself is not meant as a straitjacket, but as a tool for playing the character. There are as many different ways of playing a LG character as there are LG characters, so the argument that the alignment system stifles creativity doesn’t hold water. However, there are just as many characters who don’t fit any alignment whatsoever, and should not have an arbitrary label forced on them. Whether or not to use alignments is a question for the entire group to decide, and not one that should be handed down from above.