Why do you want to become a doctor over another healthcare career such as nursing?

This question is one that particularly trips people up because they argue that they want to become a doctor to help people and have a social career where they interact with patients - however nurses not only care for people but have much longer contact time with patients and generally build a stronger care relationship with them.A slip up when tackling this question is that they like the leadership role of a doctor or the more scientific clinical side, however there are other issues with this answer:Doctors are not superior to nurses, the team is multidisciplinery and the high band nurses/ward sisters have a very serious leadership role.Again, nurses and nursing degrees are still fairly scientific and clinical especially nurse practitioners - moreover alternate healthcare degrees such as physician assistants also deal with very similar situations.
The main difference is: responsibility. Doctors have a strong responsibility over patients at a legal level, and are trusted with discharge, prescriptions, diagnosis. Nurse practitioners, pharmacists, physician assistants and nurses cannot prescribe controlled drugs.
Moreover there are more career options from a medical degree - you can become an academic, researcher, GP, surgeon, psychiatrist; the options are wide and vast.Doctors also require a very higher level of academic rigor and challenge which must be maintained through constant testing throughout their career - outline how you are fascinated and excited by how the field is always morphing and shaping and how the continual learning process required by the degree is one that you anticipate eagerly.
Remember to back all of your point on your character with personal evidence from extracurricular and academic achievements.