Define data mining expert

Studying data mining and Machine learning as one of my course in IIT, when some one says they are dataminig experts- I assume them that they are very good in coming up with trends using some of machine learning techniques. They know what Association Rule Mining, Clustering, Classification mean.

But, in some places where they are not exposed to above, they assume data mining expert mean doing ETL operations and database partitioning/sharding etc..etc..!!!
I feel like shouting at them that this is not what it meant!