The idea is that an aggressive, potentially dangerous bid can be a good gamble if it gets you to your best contract or pushes the opponents into a bad one.
This deal, from the first-round Bermuda Bowl match between Argentina and USA1 in Portugal 2005, featured one of the prettiest defenses of the tournament.
Many HE methods pale in comparison to Culbertson’s Rule, which I had read many, many years ago in Jeff Rubens’ great book The Secrets of Winning Bridge.