I agree.. somewhat. It is interesting, but honestly.. it's a but disgrace when they use the word "Ninja" or "Shinobi".
how's it a disgrace? You know in history, ninja's are nothing like what we think of them now. They didn't run on walls or wear all black covering their face all the time. They didn't use shurikens to kill but more for diversion purposes.....they used the most modern weapons including guns if they could obtain it.
They were pretty much mercenaries/assassins....whether to spy, sabotage, spread rumors, kill, etc..
Almost every film/fiction about ninja's is inaccurate.
Naruto part 1 weren't ninja's either if you want to go by a literal definition.
But that's the whole point of fiction, because it's entertaining. Manga's use demons and angels and they are nothing like what they are in myth.
Hell the one piece characters are called pirates.....