The downside to doing this is that you'll sound like an LLM. LLM-generated text is very obvious to anyone with basic reading comprehension and once detected will cause some people to summarily dismiss the sender as a bot.
This is more than acceptable if it allows you to confidently send of an email in less than a minute that would otherwise take you 30 minutes of agony to write and still not be confident about.
Also, these aren't cold calls. The recipients aren't critical about how "botty" the email sounds.
