Re: OOh missus! - engineers carry tool cases
If you claim to be an engineer and have never used a spanner in your life, you likely aren't much of an engineer, truth be told.
If you've never had the inclination to follow the life cycle of your product from cradle to grave, & play with, or even build, the machines that make your machines, you'll never be best at what you do.
It's like saying you are a computer guru but never in your life touched a hard disk.