Then why can’t all the times Kylo isn’t being unquestionably evil just be thrown under “Ben Solo?” Why couldn’t someone say; “it wasn’t Kylo feeling the call of the light side, that was Ben Solo momentarily showing through. Kylo is 100% evil.”
There is no indication that the First Order knows who Ren really is. Conversation about Han is left between Ren and Snoke.
Outside of the movie, I mean. Why couldn’t someone watching the movie say the above?
Because we don’t know their inner thoughts. The Sith, themselves, divorce themselves from their former lives. The indication that Vader and Anakin, or Ren and Ben, are two separate people is a trope that the characters in-universe use. They had to actually tell us they’re doing that. In fact, Obi-Wan also had to tell Luke this. One could say Obi-Wan was just straight up bullshitting Luke, but his one conversation with Luke in ROTJ isn’t the only evidence of people doing this or that more than just Obi-Wan felt this way about someone who became a Sith.
Personally, I think if anything the “there is no good or evil; everyone is flawed” trope that has been popular lately (The Walking Dead, Battlestar Galactica, ST:Discovery, Game of Thrones) has been overused.
There’s your problem. TV sucks.
No. I just don’t watch those shows. There are plenty of other shows I do watch that don’t run away with doing this all the time.
JEDIT: Oh, and Star Wars has had more than 4 evil dark side characters (eg. Asajj Ventress), if you include The Clone Wars or Rebels.
The same Ventress that went on to help Ahsoka?
Ventress has her own plans. Dooku and Palpatine left her out in the cold, so she did what she did to her own ends, not because it was the right thing to do.