Google wants to deliver relevant results.
If you created a site about a short-lived but topical news item, there would be no point in having to wait to build up links etc as by the time Google started listing it, it would no longer be relevant.
So in certain cases Google lists brand new sites for competitive keywords. But it never lasts. You’ll get a period of grace of a week or two, then you’ll be back to the grind of acquiring links – the more natural the better.