As soon as the job is more than a handful of tasks for which the order is important, humans struggle to execute them consistently over a longer period of time. Computers can do exactly this remarkably well, lacking a free will.
If you do your work by hand, computers gather at night and laugh about you.unknown
Provision servers with Chef, get rid of dependencies with Docker, deploy with Jenkins—always identical, always consistent, always versioned. With those simple measures we make room for what we can still do better (for now, at least): free thinking.