Real world statistics...
They drive everything...
They are powerful...
They are what pro gun rights people use to argue their side...
They are what determines the flow of goods and money...
They determine polling and voting...
They drive software... electricity... police distribution...
Those are just a few obvious things... They run the world. Every organization that wishes to use knowledge and use it to their benefit, from governments, to businesses, to charity organizations... Uses statistics gained from real world sources.
People dismiss them, especially when they don't agree with the persons preconceived notions, but they prove themselves time again.
When it comes to bullet performance between 9, 40, and 45...
While on paper there is a difference...Bigger hole or not... In the real world, the difference doesn't matter. The difference of paper figures of size and power differences, simply does not equate to a difference in results.