"Bottom line - all Big Data tools do only one thing: placing the right index on the data.
And you pay the providers for exactly that - strategically placing the index on your data which you failed to define and place yourself."

No, Sergiy, that's NOT why I would be paying them.  NOBODY adds indexes to MY database tables without my knowledge.  If I don't have an index, it's my decision and my responsibility.  They are free to suggest, not change.