For an experienced programmer the bottleneck is usually not thinking but typing, getting what is already in your head into the editor fast enough.

Most of the time I'm not thinking, I'm programming. I know what I want to do, I want to go as fast as possible because I've been just doing it for so long and I'm so familiar with the general space that it becomes a huge problem for me. I cannot tell you how many times that I've been purely bottlenecked by the fact that I just can't type fast enough and I just need to get it out of my head onto the text editor.