Um, yeah it is a dance competition. It's a popularity contest as well (if it were just dance, why have a public vote after all) but it IS a dance competition too, which is how and why they were able to get professionals involved in the first instance, why there is a judging panel, et cetera et cetera.
If it were just a popularity contest there would be no need for the judges, for a start, or at least for them to bother giving marks, nor any need for any of the dances to have rules, vaguely resemble the dances they are supposed to be, and so on.
Vote for whomever you like, I've no doubt you will, and probably John will outlive a few other better dancers. That said, John has been a better dancer than some others we've seen, and I doubt he would have the popularity he does if he hadn't clearly tried to some extent, done the training, and improved, even if his improvement hasn't been huge. He's not very good, but he's generally in time and his dances bear some resemblance to what they are supposed to be.
Interestingly, when it's got down to the final two or three, and the audience vote has become more and more important, it usually comes down to dancing. So it seems the GBP don't agree with you when it gets down to brass tacks. Time will tell what happens this year.
Some people would like it to be a pure dance comp - me I like the mixture, frustrating though it can be. But saying "It's not a dance competition at all" ALL OVER THE BOARD doesn't make you right either...

Yep, it's light entertainment, but the celebs training all available hours each day to try and learn their routines would probably be a bit annoyed to have their efforts discounted y'know...
The further SCD goes towards the pure popularity side of the contest, the more boring it becomes, and the more we might as well watch dreck like IACGMOOH. :yawn: :sleep:
The X Factor is a case in point, with so much emphasis on the popularity side of things, it has become less and less about singing, and consequently less and less interesting to watch once you're out of the comedy selection rounds. (Though arguably some of the decisions made in the sing off have been naff all to do with singing) It's producing some of the most boring singers the UK has ever seen. :yawn: If SCD goes that way then personally I shan't bother watching it (just as I have long since given up caring about TXF)
edit:
Originally Posted by Sid_1979:
“Why would the public need to call in for the best dance when the experts have already given us this information?
Because the show is not merely a dance competition.”
Merely being the operative word - it's not merely a popularity contest either.