Hydrogeology - is the geology important?

Is understanding the geology important to a hydrogeologist? I suspect (hope) most hydrogeologists and groundwater engineers would agree that it is. Even then compared to our oilfield cousins the reservoir geologist and engineer many only give it a cursory consideration. Experience suggests there are many who do not give it much thought at all, they drill wells log core and do tests but never think beyond the point data. In my experience the latter appears to be an increasing trend, perhaps related to the decline in undergraduate geoscience and postgraduate hydrogeology education?

Properties such a permeability and porosity and thus storage and hydraulic conductivity and the heterogeneity and anisotropy of those properties are intirinsicly a result of the geological evolution of the formation. For example, in a sedimentary deposit can we really understand how groundwater behaves if we ignore how the sediments were deposited and in what environment and what the subsequent geological history of those deposits has been? Similarly, with fractured crystalline formations, an understanding of the stress regime and its evolution can help us understand the likely fracture orientation and anisotropy of permeability.

An informed understanding allows us to better understand well performance and test results and develop models that better reflect reality. Do we need to pay more attention to the geology? Should we look to learn from our oilfield cousins? Or am I worrying about nothing?