I use GPT-2/3 in creative writing to generate rough text that I then go back and edit/improve because it gives a good starting point (and often has a lot of high-quality factors).

I don't know if this translates to technical writing, but it's possible someone might complete a prompt on some specific topic(s) and then use that as a point to start from, especially if they're knowledgeable enough on the topic to correct the output. It's nice to be able to skip a lot of boilerplate words (how many words in this comment are actually the meat of this idea, and how many words are just there to tie all those morsels together?)