@scout_more_often It makes sense - IF - the cost of the missile is included in the cost of the unit. This should be true of any unit which is required to 'build' ammunition. SMD, SML, TML or otherwise.
We implemented this choice into LOUD some years ago, allowing players to determine IF missile units were to be autoloaded, and by how much. Needless to say, autoloading does encourage certain behaviors.