Originally Posted by jojo
It's funny how things that don't fit a bias become "lies" so easily these days.
Defense independent metrics remove things from the equation that are outside of the pitcher's influence and weights things that are intrinsic to his repeatable skill set. This is a lie nowadays?
The lie is assuming that K's, BB's and HR's are completely within the pitcher's influence, and assuming that hits and runs allowed are completely outside of a pitcher's influence. This attitude positions ERA and DIP's stats as an either/or.
In reality, a pitcher does not have complete control over how many strikeouts, BB's or HR's he allows, nor does he lack complete control over how many hits and runs he allows. He may have more control over how many K's, BB's and HR's he gives up, but he still has significant control over how many hits and runs he gives up, and there are limits to the control he has over K's, BB's and HR's.
My argument is that peripherals alone don't tell all we can learn about a pitcher in order to evaluate him. The elements in ERA that are missing from xFIP and the like are very informative and need to be included as well.