The original and prequel trilogies are worthwhile viewing. The sequel trilogy, however, presents a different case. While George Lucas provided story treatments during the 2012 sale, these were ultimately discarded. The sequels also marked the end of the Expanded Universe, removed from canon to allow creative freedom for filmmakers. Given that the stories deviate significantly from Lucas’s original vision, is there really a compelling reason to watch them?
I very much enjoyed Force Awakens and Rise of Skywalker. Last Jedi was painfully bad IMO. I like those other two much more than any of the prequels, true to Lucas’ vision or not.
But, it doesn’t really matter what anyone else thinks, if you want to watch them then do. And if you do, and you like them, then all good. And if you do watch them, but don’t like them, also all good. And if you decide not to watch them, also also all good.
Life’s too short to worry about a bunch of movies.