It is a method that is very structured and methodical. Art is creativity, manifested in different media. Summary of all answers to question 1 2. Scientists are not necessarily drawn to a specific subject matter. It is more so that they find that methodical way of thinking appealing.
Artists are intune with their brain, probably the more developed part.
I am sure talent must be involved somewhere. It is different process of discovery, one that they are accustomed to. Summary of all answers to question 2 3. Scientists aim to discover new things, new ideas or ways of thinking. Artists seek to achieve immortality through their works.