The term "Data Abstraction" already has a different meaning. The "simplification" of data implies an understanding of the data, and that modification instills biases in the representation that may limit the fruitfulness of the data itself.

Letting "business types" write data mining apps is already on the market and has been for a while. Look into "Business Intelligence" applications. The verdict is that a) making it easy to do BI actually makes it very complex and b) making analysis easy does not automatically expose or explain what analysis is salient.