Except those designers don't make clothes for average sized people. They make clothes for walking toothpicks. It's a completely fair point that their work has become ridiculous in the extreme.
Actually, they make their clothing for the average person, not necessarily 'toothpicks'. And as most women in Europe (probably) aren't tall or 'big', that's what designers go for. If Ms. Jones wanted, she should have either sought out a dressmaker that's not one of these designers, or just wear what she damn well feels like wearing, as this lady did when she accepted her Oscar.