The film is a 1984 adaptation of a 1982 novel by Philip Dick, one of the most prolific and visionary scifi authors of all time. It precedes GitS by 11 years and Fallout 4 by 31. It makes no sense to compare it to those later works of fiction imho.
I agree however that Roy's character is underdeveloped, I would have loved to learn more about him.
😂 exactly, morbid fascination