Difficult people are common because everyone is unique and has their own distinct personality traits, backgrounds, and life experiences. These individual differences can sometimes lead to misunderstandings, conflicts, and disagreements when people with varying perspectives and communication styles interact with each other. Different values, beliefs, and motivations can also contribute to the challenges of dealing with difficult individuals. Overall, the diversity of personalities and life experiences among people can often be a contributing factor to the presence of difficult people in our lives.