Because the anime is behind the manga and if you read the latest chapter and still like Sasuke you obviously arent someone who cares about plot or character development, it just was terrible
I'd say if you're still reading naruto after 15 years, you don't care about plot or character development. Which is true for me. Definitely couldn't care less about the character development or plot in a shonen manga. I watch and read strictly for the fights.
On topic: Don't get the thematic issues. That's like saying WuTai and Midgar look out of place because they're completely different. In context, it will be fine.