My experience is that I have to write some things that often have parts that are, for lack of a better word, somewhat boilerplate, e.g. preamble/background/explain some technical term I used/etc. Necessary but not core technical or otherwise differentiated content.
I've used LLMs for this as a sort of first draft. I edit the output but it's a perfectly serviceable way to get some words down and save me an hour or two.
In the realm of technical documentation, too, originality isn't a virtue in itself. (And I say this as a technical writer who doesn't even use LLMs regularly.)
If you needed to throw in a sentence or two ahout, e.g., what load balancing is, you're better off lifting a definition from an authoritative source than trying to come up with a "creative" rephrasing for its own sake. Standard terminology is standard because it works.
I've used LLMs for this as a sort of first draft. I edit the output but it's a perfectly serviceable way to get some words down and save me an hour or two.