Mr. Laser Beam wrote:
^ It's not meaningless. As I said, separate rank systems exist for a reason.
This reason being? That it has been so in the past is not a reason. It makes no practical difference what the various ranks are called.
This whole discussion seems to boil down to some peaople's fixation on nomenclature; Starfleet security personnel cannot do ground combat because they're not called 'marines' and have naval ranks.