The primary issue with the question is the "Why" part. This would imply that there was some reason if there wasn't. This implies some form of soft historicism,

The primary issue with the question is the "Why" part. This would imply that there was some reason if there wasn't. This implies some form of soft historicism, or some agency. There is not why, there is only there is/not. Why would make sense in some novel case statements.