No they don't. They do go to The Basic School as do all Marine Officers. While there they may get the chance to be a billet holder, but they don't go to the fleet as anyhting other than a lawyer unless they want to compete with everyone else and get whatever MOS the USMC gives them.
All a lawyer does is give advice. It takes a commander to implement it. So all you chuckleheads need to be yelling at the JAG's commander who was dumb enough to pass this on.