That's not true at all. There are lots of circumstances where adding (good) code adds velocity.
Imagine I'm trying to do a bunch of graphics stuff. The code I write to integrate a 3rd party graphics library will make my future development faster. I am effectively creating a lever I will later use to increase my productivity.
Say I need to do a bunch of linear algebra. Code I write to calculate dot products, determinants etc (or better yet to use a library to do those things) will greatly accellerate progress later and enable me to think in terms of the linear transformations I'm trying to accomplish rather than the underlying primitive operations.
Imagine I'm trying to do a bunch of graphics stuff. The code I write to integrate a 3rd party graphics library will make my future development faster. I am effectively creating a lever I will later use to increase my productivity.
Say I need to do a bunch of linear algebra. Code I write to calculate dot products, determinants etc (or better yet to use a library to do those things) will greatly accellerate progress later and enable me to think in terms of the linear transformations I'm trying to accomplish rather than the underlying primitive operations.