How can someone be 'wise' but still be considered ignorant according to Chapter 50?

Chapter 50 clarifies that a person's knowledge is merely ignorance if they remain attached to worldly things. It explains that someone whose mind is fixed on wealth and luxury, who is unsatisfied in sense enjoyment, and who is constantly thinking of their wife and sons, does not truly know their own welfare, even if they are considered 'wise' by some standard. Such a person is described as being deluded by money, children, and wife. The chapter concludes that as long as a person is without devotion, their knowledge is ultimately covered by ignorance.