With Indiana Jones you knew before going in that it was a recreation of the old suspense movie serials of the 30’s and 40’s....................
Do you remember “Ramar of The Jungle” in the mid-50s?
https://www.google.com/search?client=opera&q=Ramar+of+The+Jungle&sourceid=opera&ie=UTF-8&oe=UTF-8
“Sky King”?
Formulaic, as was “Indiana Jones”.
Spielberg said in an interview, that he wanted to re-create that era and aura of TV show, in a movie series.