Why would anyone want to hack you? The answer almost always comes down to money. Hackers are not targeting you, they are targeting the websites that have weak security. These are a few common types of hacks that I see on WordPress sites, and the motivation behind them.
WordPress is a complicated piece of software. It has half a million lines of code which make up the features we know and love like the ability to edit our content, the WordPress email notifications, and the dashboard that lets us control the site. The downside of this complexity is that the more features WordPress has, the higher the risk of a hacker finding one to exploit.