If your work is analogous to digging a foundation pit or something like framing up homes in a development, that makes a lot of sense. But that's not the only kind of work many of us do, and analogies to things like finish carpentry, functional sculpture, or fine furniture are more applicable. Hand craft doesn't always make a difference, but there's plenty of places where it does.

Plus, for a lot of people with fluency and experience, it's simply more fun/natural and not meaningfully less productive.