The dog world encompasses a diversity of all kinds of people interested in all types of doggy activities - like it or not most of us who show a no-fuss breeds see our dog firstly as our pet and best friend, just like your self.
A lot of people who show Rotts also do proper activities with them that stimulate their minds, activities such as tracking, working trials, obedience, agility, flyball, Rotties will also do every job individual Gundogs breeds do. They make superb PAT dogs and many of the show dogs do PAT work they are also favoured for helping those with phobias get over them. They are also excellent search and rescue dogs.
You see the Rottweiler is such a versitile dog which is why it is so admired added to which a collection of Rotties trotting around the ring is a sight to behold. I was unaware that it was a crime to want to exhibit top class examples.
As for your comment about Rotties not needing to trot all day all I can say is no wonder dogs are in the state they are when people do not understand the basic concept they are perpetually crowing about. FIT FOR FUNCTION. Meaning sound enough in all ways to go out and traveling great distances tracking prey before a final burst of energy to catch 'dinner'. Hmm I s'pose people have strange ideas about dogs, with some prefering that a dog live in a void, tucked up in expensive beds with fluffy blankets, too many toxic treats being over fed with no choice but to eat the dry food it is offered.................
I dont see the need for dogs to be dancing, whats the point? but I also dont find the attack the owners about it