I think it's more about mind melding with the problem you are solving. Having absolutely nothing else cognitively distracting you from what you are doing gives

I think it's more about mind melding with the problem you are solving. Having absolutely nothing else cognitively distracting you from what you are doing gives you that additional working memory space to tackle complex problems. It's not sufficient, there are a bunch of other factors, but to my mind, if you have to think at all about typing, you can't achieve that top echelon of concentration.