The whole slant against "the business intelligence community" is just uninformed IMO. I think that there's another side to this that the author neglected to mention: self-service BI. The people who the author claims need a "SQL education" might be better served by a well designed OLAP structure that has a solid, easy-to-use front-end that allows users to find out what they want without having to resort to SQL at all. Microsoft has made great investments and strides in Excel, Excel-based tools (like PowerPivot), Report Builder, and SharePoint (to name a few) that really make it quite easy to browse relational, tabular, and multidimensional data. Does it help to learn SQL? Probably. Is it a barrier to entry? Sure, at some places. However with tools like PowerPivot it's becoming less about "learning a new language" and more about "just getting to the data".
These tools are "magic beans" or other marketing BS - they're very real tools that work great.
These tools are "magic beans" or other marketing BS - they're very real tools that work great.