When should you not use design thinking?
This question is actually quite easy to answer: Don't use Design Thinking in processes that are not open-ended. Design Thinking is an exploratory approach used when the problem behind the problem isn't really understand and a convincing solution isn't obvious. This setting mandates an open-ended process!
Is design thinking a good career?
Design thinking is one such problem-solving skill that every professional needs to have. It is focused on solving problems in a creative and user-centric way. So no matter what industry you are in, being skilled in Design Thinking will help you solve any problem that occurs in the most effective way possible.