Because to me you don't feel like a ODST at all. Just because you have NO Shield doesn't make it ODST Gameplay.
Let's go down the list...
Made your first hot drop into HaloWaypoint.com
Halo 5: Guardians MP Beta participant.
View your Service Record on the web.
Become a member of an active Spartan Company.
Awarded to Spartans who match with 343 during Flight 2.0.