Every time there is an awards ceremony I find myself asking the same question. How and why are people able to wear outfits that so obviously aren't flattering to there figure and stance.
Surely there is time - if even 15 mins before the event to take a quick Polaroid of the dress on the person and in a quick 'photo pose' to see if it actually photographs well.
Because. That's what's needed - it doesn't matter how it looks in 'real' life. It's how it photographs, is what the majority of people will judge it on...