GodOfGreedAs
You are making a big mistake or the protagonist is making a big mistake. Henry thinks that the people in his current world are exactly the same as the famous people in his old world, that's wrong, because he doesn't consider "almost the same" to be much different from "the same." Therefore, in a new world "almost the same" as the previous world, Henry's existence makes it a different world, with different variables and the story will have changes; people who were famous will not be famous, famous writers will not be famous... Furthermore, Bill Gate's talent is not programming, it is business administration, Bill is rich and with his wealth he hired programming experts and bought companies with good resources. đ