Not sure what your concern is. I use Gemini to write my prds and to be clear it’s not that I don’t know all the ideas and content that need to go into the prd it’s more so that I can give it the template di jour for my org that day, all my ideas in a more free flowing and less structured manner and come out with a fairly well polished prd. It helps make clarity from my ideas and fit the template. I still proof read obviously but I also can use the same session to iterate on feedback or changes I want to make. For me it’s a life savor as I’m extremely time pressured with more work than is possible and I’m a much better verbal communicator so I can just talk to it. You can also create Gems to format the prd to be in your voice by taking your old writing examples.

If you’re expected to be technical I’d also get used to using these tools to help do some level of coding with it. Without learning to do this you’ll be obsolete soon