[pseingatl]

What I mean is that in your example the only content is "Hello world." The rest is typesetting. The original question asked, "what tool should I use to write?" LaTex answers the question, "how can I typeset what I have written?" BTW, Lyx is a terrific program. My only complaint with it is that I haven't found a way to mimic a word processor's tab behavior consistently. The tabbing package doesn't do it for me. \qquad does, kind of, but that's six keystrokes. The problem is that in some kinds of writing text placement may have meaning and this conflicts with LaTex's underlying paradigm of automating typesetting decisions.

[jimhefferon]

LaTeX was certainly intended for a document such as I wrote so you are wrong, as documented in Lamport's book.