Pearls to swine!
I have had the misfortune to work for Managers who proudly profess they dont need to understand what they are managing, merely manage it properly. I have worked with a senior accountant where I have shown him how to use Newton-Raphson to minimise the cost of a relatively simple process.
Two things will have to happen for BI to catch on properly
1) Those in sales looking at the output will have to learn what it actually means and that will require more than a C at O'Level maths.
2) Managers will have to actually know more about it than those in sales as this will have to be applied to production etc.
Neither is going to happen in my lifetime.