If we are talking league tables here then solicitors are far worse than private dentists. I am not having a go at all dentists here. Most of them are worth every penny they get. It's just the private ones, especially the ones who know they are in an area which is short of NHS dentists and milk the situation for all it's worth. Fortunately, in Scotland anyway, the situation is better than it was about 10 years ago. Most folk now can have access to an NHS dentist if they put in a wee bit of effort. In the last 10-15 years a lot of folk have been persuaded to do dental insurance schemes with private dentists, not knowing there is an alternative. This could be the next big ppi type mis-selling scandal.
I have a great dentist. He does a mixture of NHS and private and has never tried to persuade me to go private.