Can a person who seems wise still be considered ignorant? What do worldly attachments have to do with it?

Yes, according to chapter 50, a person can be 'wise' yet still be trapped in ignorance. The text explicitly states that someone whose mind is fixed on wealth, luxury, and sense enjoyment, and who is constantly thinking of their wife and sons, has a knowledge that is merely a form of ignorance. Such a person, deluded by these worldly attachments, does not know their own welfare. It is highlighted that as long as such a person is without devotion, their knowledge remains covered by ignorance, preventing true understanding and self-realization.