How does the author's approach to life's priorities challenge conventional wisdom?

The author's advice relates to the concept of mindfulness or living in the present moment by emphasizing the importance of being selective about what one cares about. This is a form of mindfulness because it requires conscious thought and choice, and it encourages living in the present by reminding readers of their mortality and the limited amount of time they have.

Not caring about certain things can lead to a lack of empathy and understanding towards others. It can also result in missed opportunities for personal growth and learning. Additionally, it can lead to a disconnection from society and the world around you, which can lead to feelings of isolation and loneliness. Lastly, not caring can sometimes be a symptom of underlying mental health issues such as depression or anxiety.

The author's advice can be applied in a practical, day-to-day context by being more selective about what you care about or give your attention to. This means not getting overly concerned or stressed about things that are not important or do not contribute positively to your life. Instead, focus your energy and attention on things that truly matter to you and contribute to your happiness and well-being.