If I ask more than one question, and someone answers one of them, my opinion of their intellect drops considerably. From that point forward I will communicate with them like a child, and written communications will take 5x longer because messages have to be restricted to one question max.
I had a manager more than once that responded with "y" for affirmative and "I'm ignoring you" was no. One of those guys said if he didn't get back to you in am hour resend or track him down because he didn't read "below the fold" in his inbox (this was when we used email for everything).
This happens in every company as well. The lower down the totem pole, the more legible your emails.
New guy sends a carefully crafted, 6-paragraph email with context, analysis, decision point, options and recommendations, summarising a month's worth of work.
CEO's email, sent during another meeting: "ok. mak sure bob knows so it dosen't impact projext wildebeest"
The new guy has to scramble to figure out who's bob and what's wildebeest, and it turns out the CEO meant Peter instead of Bob
Some people, sure. It’s usually more something like “rewrite my (casually written) text to sound like a professional email” and ChatGPT is gonna add all the business lingo fluff.
I've seen a lot of junior staff who don't know proper email etiquette put a lot of formality into their emails. It isn't a stretch to get an AI to add it for you.