I follow the same strategy, but loosely - I need those emdashes to signal that I’m using the tools.
Likewise, I often used literary flourish and pleasantries like that above article about email decompression; I’m from the south so I think structured formality comes with territory.
I do think using LLM to turn notes and bullets into narratives should be considered no different than rendering CSV text into an excel format, just making it more digestible by recipient.