I think the point is valid even if this fight wasn't the best example. Is there room at the top of the UFC for a grappler with limited striking? Is it easier to train Takedown defense than Takedowns? If so does that mean that a decent wrestler with better striking will always prevail against the BJJ-based fighter simply because the fight won't get to the ground?
Shields is a great wrestler and BJJ practitioner, and as such he represents grappling's greatest hope: A guy who can credibly get the fight to the ground and finish it from there (sorry Jon Fitch, that ain't you). Ricardo Almeida was the last great hope, in my opinion, but look where he ended up.
Look at Vagner Rocha. A world-class BJJ fighter, who will likely never see a main card. Sure, he won last night, but only because he fought another BJJ fighter, albeit a less talented one, who wanted to take him down. It's frustrating to see talented ground specialists get shut down before they can even showcase their skills. Like being one of those soldiers in Saving Private Ryan who gets shredded by machine gun fire before he gets a chance to storm the beach.