There are several reasons why some people may have underdeveloped aptitude in ethics, including:

1. Lack of exposure to ethical concepts and principles: Individuals who have not been exposed to ethical concepts and principles may have a limited understanding of ethical issues and how to navigate them.
2. Limited critical thinking skills: Ethical reasoning and decision-making require strong critical thinking skills. Individuals who have not developed these skills may struggle with understanding complex ethical issues and making sound ethical decisions.
3. Cultural and societal influences: Cultural and societal values and norms can have a significant impact on
   an individual’s ethical aptitude. Individuals who come from cultures or societies that prioritize other values over ethics may not have developed a strong aptitude in this area.
4. Personal biases and values: Personal biases and values can also impact an individual’s ethical aptitude. For example, individuals who have strong beliefs or biases that conflict with ethical principles may struggle to make sound ethical decisions.
5. Lack of practice and experience: Ethical decision-making is a skill that requires practice and experience.
   Individuals who have not had the opportunity to practice ethical decision-making may have an underdeveloped aptitude in this area.

It is important to note that ethical aptitude can be developed and improved over time through education, training, and practice.