With regards to Star Wars I know it had its origins in Flash Gordon serials. And skeptical audiences might only see space pew pew and weird mumbo jumbo but it's more there is depth and philosophy-Campbell, luminous beings we are, and so on. The Old EU had a tremendous amount of worldbuilding with novels like HTTE pushing plot structures beyond movie limitations and series like NJO having far more mature thematic arcs and points. Traitor being the shining example. Disney treats it as another marvel franchise to be endlessly rebooted and sustained with nostalgia and female protagonists.