LOL, it actually is that simple. And it always has been. If people would actually listen to what Google wants, they would realize how simple it is. And, as you know - while ranking for my target keyword I subsequently ranked many other similar keywords that I wasn't even aware of at the time. And I don't use Adsense, nor do I recommend anyone else using any ad network as a revenue source.
I would always advise people to use UNIQUE content! It won't take you more than 2 minutes to rewrite a product's description!