I get your point. Fortunately I'm at an age where I can delegate the grunt work in my profession if I feel the need. I however am very glad I went through that stage. It does build discipline and craft.

As I'm a chronic life-long daydreamer I still manage to think outside the task at hand despite necessary attention. Too much concentration is detrimental in my case. I'm prone to step out of my immediacy and monitor muscular tension or my movements as I work, or at times what is going on in my mind. A sort of silent meta-thinking that I greatly enjoy.