Because they'll block you. You can prevent Google from indexing your content using robots.txt (Google has a robots.txt on its site as well). You don't have a r

Because they'll block you. You can prevent Google from indexing your content using robots.txt (Google has a robots.txt on its site as well). You don't have a right to access their service as many times as you want to, eg by automated means, although you can attempt it. Flip a coin on whether they sue to stop you if you become too annoying. The Genius complaint is essentially that they want to be represented in Google search without having Google take lyrics from their service and use them in their own served-up content snippets (making a sizable part of the value of genius.com void). Genius knows Google can get lyrics elsewhere if they have to, the lawsuit is probably out of spite due to past conflict with Google and their annoyance at Google competing with them in a shady way (Google was de facto using Genius's service to reduce the value of Genius).