Well yes, obviously sport bjj is 100% sport bjj. But sport bjj isn't all of what bjj has always been about. The fact that there are so many high level bjj practitioners in MMA is not a coincidence nor an accident. It was designed for a fight. The sporting aspect existed simultaneously, and allowed practitioners to hone their skills and develop them to a high level. Sport-style training and competition is certainly part of bjj. But what Rickson is saying (taking into account that all percentages like this are arbitrary) is that the art that he learned and taught is not purely sport, and is meant for fighting and self defense as well. Whether you choose to train purely for sport of not, that's your choice. There's nothing wrong with one or the other. But what Rickson is saying is merely that the jiu jitsu he believes in is not just a sport, although sport is part of it.
I don't see what part of that people find so objectionable.