To clear up a few points:
1) the person at your Town Hall was not the Career Manager, she is the Naval Military Police Group Chief Petty Officer;
2) even if she was the CM, the CM does not have any say, in any shape or form, as to who deploys; and
3) pre-QL5 should not be deploying on tour for the simple reason that with work up training, the deployment and then the post deployment period, it is unlikely that they will be able to attend their QL5 on time. This has financial, and other, implications for the member.
When we were trying to put 120 MP into theatre, we didn't have a choice but to deploy non-QL5 qualified pers, now if the CoC can't find any QL5 Cpls who are suitable, willing and able to deploy, someone needs to get their crap together.
Having said that, CP is a different animal and then you will see pre-QL5 pers deploying, no question asked.