"My editor makes it really easy to do this terrible thing, so it's okay!"
I'm sorry, I quite enjoy many aspects of Go - but the argument that committing one of the cardinal sins of programming is okay because your editor makes it easy is worse than the actual language shortcoming itself.
Code duplication is not a cardinal sin of programming. In fact, the attitude that it _is_ has probably done more harm to [modern] programming than duplication ever did :)
I'm sorry, I quite enjoy many aspects of Go - but the argument that committing one of the cardinal sins of programming is okay because your editor makes it easy is worse than the actual language shortcoming itself.