Because you can't be a resident of multiple states, or at least not in most systems like vehicle licenses or taxes or what have you. Say you're driving, and co

Because you can't be a resident of multiple states, or at least not in most systems like vehicle licenses or taxes or what have you. Say you're driving, and commit a felony, and are caught on tape. The idea is that the license identifies you. If you have fifty licenses and fifty addresses and you're not at 49 of them, then it doesn't serve that purpose. For that reason, it's considered fraud. Likewise if you have one ID and it isn't accurate. Sure, there are grace periods and what have you but the end result is the same.