You see, that's the point - I don't have to name them. I have to know they exist, know their function, and what general powers they possess. I know German Generals existed, had massive military might at their command, walked over large portions of Europe and took the most massive mobilization of out country's military might to beat. I do not scoff at those generals.
And those generals all lived and died before I was born.
Now, remember that scene in Star Wars, where a bunch of military commanders are making fun of the Jedi old religion to Vader's face. The men in the room with Vader were around for the Clone Wars. Any of them over the age of 40 were very likely in the military during the Clone Wars. They likely served under those Jedi generals!
How many saw the force in use?
It's probably because Star Wars was also self contained and expanded on later. Lucas didn't do the best job with the prequel Trilogy in that regard.
Pre 1999 it made a bit more sense especially in the Thrawn Trilogy.
There's a reason why there's only 3 good Star Wars films. Maybe 4 with Rogue One.
George changed his mind a lot, later writers didn't care.