I don't think absolute precision regarding specific commands or flags therein would be required because when you're in the chair and dealing with a problem you'

I don't think absolute precision regarding specific commands or flags therein would be required because when you're in the chair and dealing with a problem you're going to have access to the resources you need to get that precision (man pages, vendor documentation etc). Though being able to explain the mental model of how you want to go about manipulating the output, extraction of the information or data you need, be it through json manipulation, regex, line/column parsing etc is valuable.