that's because they use a data warehouse imo. There are much better ways to analyze big data problems, it's much harder to encode a priori and a posteriori knowledge into a 3rd normal form data warehouse, for example the ability to see that in if you are a sorc, PT, or assassin it's much more normal to place in T1 given historical data.
and I'm a semantics (relationships and patterns) guy, I can't imagine what a few of the stat/fusion guys at work would do =D