One thing missing in the DW DBA article is the ability for the DBA to adapt quickly. Datawarehouses typically aggregate data and may only use a subset of OLTP data. While on Monday a field is not needed, by Tuesday it may be critical to business. If you cannot quickly adapt, by the time you react you have missed critical timing or missed a trend (good, bad or whatever). I put together data for medical trending. Outbreaks, new dangerous trends, new drugs that may cause good or bad outcomes ... All come at you quickly and if you cant' quickly modify your design and load data, then don't bother.

Also if you don't like granting access to your data, or feel you are the only one that can write SQL - you will be a datawarehouse log jam!