You're forgiven because your avatar is awesome.
Casualty reports were supposed to be in the trillions.
Is that because planets were expected to be sacked or is star fleet numbers in the billions?
Getting ont a Star Ship is hard. especially if there are only 100s of thousands of spots and billions of Officers jockeying for pole position... If you get on a star ship you're super special.
There are millions of lieutenants just maintaining/guarding random transporter pads on planets and never see space.
Positions on star bases is difficult, positions on Starships, permanent ones at least, are impossible. The Boy who could fly said that that there was a mandatory minimum required time that ensigns had to serve on starships to keep rank.... Which was just a couple weeks I think.