Temis the Friendly Ghost wrote:
The modern audience isnt going to know or care how militaries were in the olden days, but they'd know how things works nowadays in a general sense, so that's going seem right to them. But the real reason to rotate characters more is not "realism" but dramatic impact and flexibility.
It's obvious that Roddenberry modeled Star Trek on the US Navy, which he had personal experience with. Where do you think the USS Enterprise got its name?
He was in the US Army Air Forces.