I don't wanna beat up Star Wars too much. The original film was a seismic disruption to the entire industry. It came out like 9 months after Logan's Run - you want some cognitive dissonance, watch Box and the Star Filters in the Disco Cave and then sit down to Alderan. Star Wars broke the mold, shattered the industry and remade it.

And honestly, it borrowed from good sources. It's just that once Star Wars and Empire were done, nobody was ever going to tell George Lucas what to do ever again so we kind of get Ewoks all the time now.