In the old days there were freak shows at Fairs. Nowadays it's been repackaged as talent shows (and has been for as long as there has been TV - people credit Cowell with this but New Faces was nigh on identical. And Opportunity Knocks anyone?). People love the bit with the nutters and the occasional (relatively) talented singer. Then get bored as the filter out the chaff until the very last few are left. It's an old, old formula. Don't kid yourself it's the modern generation!