I'm not seventy but I do remember The Lone Ranger from TV in the 1950's.
It was a program for children, as in three to five year old children. By the age of ten, you had long since outgrown The Lone Ranger. It was part of an era where kids would say, "Let's play cowboys and indians". It was one of very few programs where an American indian was a "good guy". At that age, 5, no one really recognized the socio-politics of this.
It is only as an adult I will say Jay Silverheels' "Tonto" was a more interesting character than the Clayton Moore's "Lone Ranger". As a kid, everyone wanted to be the Lone Ranger, Tonto was second best. No one wanted to be the bad guys.
It was simple entertainment for young children.
Did you, as an adult expect anything more? Why?
Also, I'd like to know how this ever got produced. What was the agenda that resulted in a children's program being remade into a movie marketed to young adults?