Bobconnie--that may
work for you in Louisiana for your purposes, but a lot of us like to rent cars occasionally when cruising, etc. Or, we just want to keep a car someplace we come back to occasionally. You will be surprised next time you go to get a "real"
license, at least in most states. Now you have to be able to prove your ID with multiple sources, including evidence of your street address, your social
security number, etc. Without an existing
license you would be starting from ground zero.
Here's a link to Louisiana's current ID requirements for a license. If you got pulled over with that international license someplace in the USA you might be in a heap of trouble.