You're correct when you say about YAGNI not necessarily leading to "elegant, short, and easy to maintain code". That is, in the end, up to the developer's skill.
Well, I agree with you because you're agreeing with me, but I'm not sure your comment that I replied to agrees with you. From my reading, it definitely implies that YAGNI leads to good code and architecture astronautics doesn't, entirely ignoring developer skill. Perhaps you just oversold your point.