One thing the programme does is highlight how many delusional people there are in the UK and how many mentally ill people there are. Especially the particularly disturbed people who come back year after year, clearly after not bothering to take any voice lessons. But then why would they? I was watching Cheryl Cole perform live at some concert a few months ago and it was embarrassing. She has a voice but she really needs to fine tune it and most of all strengthen it. She sounded like someone on the karaoke. Yet she's a successful 'singer.' If after all those years as a singer she doesn't feel she needs to vastly improve her singing then why would the people auditioning.
As a good example, take Rhianna. When she started out she had a terrible nasal voice bordering on the whining. Now, she can sing. Listen to that cheating song of hers vs. Russian Roulette. BIG difference. Now it's clear she has done some considerable voice work.
But for our Z list celebrity culture, talent is a minor consideration, if it is one at all. So sadly, I doubt we'll get much good singing tomorrow night.