Steve Jobs is manifestly a marketing visionary and an advertising genius. Nobody is arguing that he hasn't made a magnificent contribution to the popularisation of well designed operating systems, with well designed hardware and software. His work as a counterpoint to Microsoft Windows' dominance is beautiful.
Nobody is arguing that the story of Dennis Ritchie's life would make a 'thrill a minute' best selling tale of boardroom backstabbing, intellectual property re-appropriation, wheeling or dealing to rival Steve Jobs' memoirs.
The point is clearly that Dennis Ritchie, in collaboration with Ken Thompson, was brilliant enough to invent some very important tools (C, the C shell, & shell scripting for that matter) because they required these tools to design Unix, an operating system so beautifully well conceived that now, decades later, Unix or unix-like systems run just about every non-microsoft computer on earth, from embeded dvd players, iPhones, Android phones, iMacs, through to most top 500 super computers. Further, the tool that they developed for designing Unix (the C language) was so well designed for its intended purpose that decades later it is still being used, extended and developed for use in the vast bulk of the remainder of computers in the world today, Microsoft systems included.
I'm happy to click a +1 button to give Dennis Ritchie more recognition that he's received to date. I seriously doubt that Steve Jobs would object.