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Why does it bother you? That is a rather odd attitude to have to people celebrating the life of someone who was successful in his chosen field, and did a lot to push computing industry to where it is today.
The only reason this would bother you is if you have what is bordering on an irrational dislike of Steve Jobs to the point that other people praising him offends you, or rather your sense of "fairness".
Steve Jobs was more well known that Dennis Ritchie, more people knew him and what he was about. Dennis Ritchie chose a life away from the limelight, therefore he is less well known than Jobs. There is no inherent unfairness about this. It doesn't diminish his achievements the least bit.