All the great SEO in the world won’t make your site great if you get hacked. There are bad people on the Internet who want to break your website, infect your visitors, steal your data, and blackmail you.
From the Panama Papers fiasco (an old, insecure version of Drupal was in use) to your garden-variety script kiddie, it’s apparent that you’ve got to invest in your defense and protect yourself and your Drupal website.