What does being single-minded than was fair to those close to you mean?

Being single-minded means being intensely focused on a specific goal or pursuit, often to the exclusion of other aspects of life or the needs of those around you. When this focus becomes excessive, it can lead to neglecting relationships, causing frustration or hurt among family and friends. Essentially, it suggests that one’s obsession with a personal ambition may overshadow the emotional and social obligations owed to loved ones, resulting in an imbalance that is unfair to them.