I'm well aware of that. Knowing OP is at very beginning stage, I'm sticking with textbook explanation of pushing/pulling. I'd rather have op get the ballpark explanation than getting buried in technical accuracy and lose the big picture.
I know you know.
I just think that it is really important for beginners to understand that pushing and pulling are development controls, that influence exposure, rather than exposure controls, that influence development.
“Photography is a complex and fluid medium, and its many factors are not applied in simple sequence. Rather, the process may be likened to the art of the juggler in keeping many balls in the air at one time!”
Ansel Adams, from the introduction to The Negative - The New Ansel Adams Photography Series / Book 2