It is, in my opinion, just as much a pros job to provide a memorable and enjoyable experience as it is to teach them to dance.
It absolutely is, imo, and if you look at the ones who were among the first out in the last series - Nikita (Kanda) and Gorka, for instance. I enjoyed their performances. They always looked so upbeat and like they were enjoying themselves. She was never going to get very far but she was sad to leave because it had been a great, fun, experience for her. That's a pro's job well done, in my opinion.
Les and Nancy, another example, they seemed to have great fun too. Again, Les was never exactly going to be setting the place alight, but he genuinely seemed to have a great experience and spoke very warmly about Nancy.
I think it's probably quite a challenge being partnered with someone without a whole lot of potential and it's a measure of a real pro, to do what they are being paid to do, tailor the dances to the ability of their partner, and make it as good as possible for the celebrity.