Yes and no. Knowing the terminology is a short-cut to make the LLM use the correct part of its "brain".

Like when working with video, if you use "timecode" instead of "timestamp", it'll use the video production part of the vector memory more. Video production people always talk about "timecodes", not "timestamps".

You can also explain the idea of red/green testing the long way without mentioning any of the keywords. It might work, but just knowing you can say "use red/green testing" is a magic shortcut to the correct result.

Thus: working with LLMs is a skill, but also an ever-changing skill.