But not having to think about typing reduces your cognitive load. Touch typing as a coder isn't about speed, it's about freeing your mind from having to think about your fingers.
Touch typing is somewhat overrated. I never learn to touch type and never had any regret over it, don't get me wrong, I do t peck for keys either but the speed of properly touch typing is no need for me, I'm not a professional typist. I on the other hand am great at remembering shortcuts and I think that's way more important to my work than touch typing, I feel that using the mouse to open a menu and click debug as a complete waste of resources and mental focus.
While I totally agree with that, there are times when typing is my bottleneck. It's often the case that once I've figured out what I want to say, the next challenge is converting it into text. During that phase, I want to be able to quickly convert thought to words on a screen without any barriers.