one or more may apply to any given person
1: people become branded: if they like a company for one reason, they will look for other reasons to like it
2: people are stupid: they will buy things on a whim or without much planning
3: people are professionals: but rarely will they have the patience for something they aren't invested in. if someone spends years focused on something such as graphic design, they probably won't want to become an expert whenever they make a purchase