I don’t think an answer has to be specific to be useful. Often just understanding how an expert in a certain area thinks about the world can be useful even if you have no specificity.
When it comes to questions:
1) What was the greatest discovery in your field in the last 5 years?
2) Is there an insight in your field that obvious to everyone in your field but that most people in society just don’t get?
I don’t think an answer has to be specific to be useful. Often just understanding how an expert in a certain area thinks about the world can be useful even if you have no specificity.
When it comes to questions: 1) What was the greatest discovery in your field in the last 5 years? 2) Is there an insight in your field that obvious to everyone in your field but that most people in society just don’t get?