No actually! It's not a problem for me to write text per se. Actually it's a significant part of my job to write guidelines, documentation, etc.
What's difficult about replying to people is putting my opinions in relation to the other's expectations.
Your last paragraph is interesting! I can feel similar effects actually. I feel more and more confident in the way I would reply. Most of the times I know what and how to write, seeing that validated helps.
And ChatGPT has definitely a tendency for complicated wording.