Originally Posted by Sallyforth:
“At the risk of starting another argument about this issue...if the function of the public vote is merely to mirror the judges' assessment then there is little point in having it. Given that the public give their support for a wider variety of criteria than the judges do, it is almost inevitable that it won't, and therefore at least one less competent dancer is almost bound to outstay at least one more competent one.”
The public vote has a role because the judges will indicate a range of people who have a claim to win. The function of the public vote as a whole is to make a choice of what they prefer within a responsible range and mindful that its a dancing show not a standup comedy audition or a beauty pageant. The judges give comments - like this one is technically best, this one acts it best, this one isn't quite as good but has improved most or even this one is good but should be better. The audience pick who they want and which relevant criteria they want to vote for. The judges usually reflect that too as the top dancers will get similar marks and who gets what and the comments may vary from week to week. As no one will be perfect in all respects and people will impress in different relevant ways there's plenty of role for the audience in deciding what looks best of the best to them.
The problem comes if the audience vote votes on completely different grounds for the funniest or the prettiest or the worst dancer or the one who has worked hard to become mediocre or on race, sex or past history . On top of that you have an anti-judge vote which votes solely for who the judges don't think is any good and a sympathy vote to save who ever is in danger without thinking that someone better will go.
It should be essentially the same as any competition with a task to be learnt. There's some people who can't do it, some who can do it very well and a debate about which of the people who do it best is the best. It shouldn't be about rewarding who is worst or who failed most spectacularly or who the examiner found attractive.