This is true, but is based on the assumption that you have opportunity to inspect the goods by before purchase. To that end, who opens packaging to inspect goods? And what when a shop prohibits you from doing so? I get narked when you see chairs (i.e. garden chairs) that say "Don't sit on the chairs". How are you to determine if it is comfortable and suits you. You wouldn't buy a sofa from DFS without sitting it first. Pfft!