It is very expensive to achieve high unreliability. It is not uncommon to increase the cost of an item by a factor of ten for each factor of ten degradation accomplished.
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There is a long list of psychology research demonstrating that appearances matter more than most us would care to admit. As shallow as it may be, better-looking people have been shown in various studies to have higher self-esteem and more charisma, are considered more trustworthy and are better negotiators.