I use the artist as the ideal example of someone who innovates for a living in the most uncorrupted, purest sense. Then, I expand the definition out to designers who have moved the creative process into a structured, business environment.
Artists provide the foundational approach and designers show it can be done anywhere.
I use artists to ground the definition. My observation is the term Design Thinking was coopted by business consultants who did not understand the term or the creative process used to innovate; therefore, their explanations are shallow and often incorrect.
The field of Design provides the process and terminology to allow anyone to reproduce the innovative process.