Only liars can create fiction?
Fiction itself definitely isn’t a lie. Unless it’s seriously and convincingly labeled “non-fiction”.
I’ve written stories. I’m no pro but I have done it. But in my daily life I don’t tell lies.
So yes, to me it is a bit mysterious that greats like Hemingway and Faulkner have to embellish when they write non-fiction.
I bet Asimov wasn’t a liar (just picking one other great at random).
That's quite a little creation there on your part.
Nowhere did I make such a claim.