Here are 7 reasons why highly intelligent people are less happy. Intelligence is a very important part of life, but it does not guarantee happiness. So, what are the struggles only highly intelligent people have? For starters, smart people have fewer friends, and it is often hard for them to find love. And since they’re usually introverts who have high standards and a tendency to overanalyze things, more often than not, highly intelligent people prefer to be alone. Furthermore, highly intelligent people struggle with depression and anxiety more than average humans because of their high expectations for themselves and others around them. This can lead them to feel lonely or isolated.