Yes, very much yes - sure, I can expect to get an appropriate response, but that doesn't change the fact I don't know what to write about to start the conversation. Empty text box does indeed scare me - if I want to write something, but have no good idea what to write (or more than couple competing ideas that feel equivalent), my mind simply goes blank.
Yes, this applies to ChatGPT too. There's million of things I want to bounce off GPT-4. But when I have the time, none of those things come to mind.
Surely the author and I are not the only ones in this. There's a reason the "fear of empty page" is a term amongst writers. There's a reason you may occasionally hear of the "fear of empty text editor" in context of programming.
Of course, if I know what I want, then it's all fine - except, I find myself constantly constrained by my own typing speed. Doubly so now, with the recently improved response time of OpenAI's GPT endpoints.