The count has percentages associated with it. A 2-0 count is about the best count to look for something hard and over the plate. Smart baseball players understand the count and adjust.
If you have bases loaded, you know you are going to get a steady diet of fastballs over the plate. That helps stats.
If I am an 8-hole hitter with a pitcher behind me I am not going to get much to hit. If I am hitting 3rd with Pujols behind me, I am going to get better pitches to hit. Who is behind you does protect you.
The team I coach improved when I got a hitter to protect my better hitter. He saw many more pitches which helped.