Okuyasu and Josuke are still high school kids , regardless of how they look or sometimes act . Josuke uses his power in the most destructive way possible only twice during the story , and only because both targets threatened his mom . I think they ' re both but moreso Okuyasu holding back because killing is not something they want to do . Okuyasu ' s brother already died , and his father might as well be dead . He ' s probably put some serious thought into what his stand can do , and decided against using it recklessly . Orrrrrrrrrr maybe Araki just didn ' t want him to erase every problem at will . <| sep |> Unless his degree was engineering , he ' s probably too qualified for their apprenticeship but not qualified enough for a full time job .