It's all too easy for some people to get carried away in the wishy washy love story with Apple and Steve Jobs, but he was just a guy with a bunch of great product ideas and Apple are a company of well-screwed-on heads. They didn't invent the Internet, or the wheel, or come across electricity or nuclear fission.
I respectfully disagree. By your logic, Henry Ford didn't change the world since the wheel was already invented at that point. All he did was figure out how to make 4 wheels support passengers and go fast. Edison didn't change the world... electricity was around before he helped light up the night in American cities.
Point is, Apple took a lot of great ideas, put them together, and created products that have found their way into peoples lives for the better.
Just for good measure, the man who is credited for creating the world wide web (which I recognize is not the same as the Internet), did so using a NeXT machine - something that Steve and his team created.