No, this isn't Google's fault; it's yours
I wanted to go into computer security when I was in college. So I keep a interested amateur eye out on computer security issues, and this is a big one.
But it illustrates the biggest problem with computer security - people don't want to do it. People take shortcuts to make their systems and networks easier to use, and make them far less secure in the process. They take the easiest option to make resources available, and all too often, it makes other resources available at the same time. And the true costs of these errors are hidden, so there's no incentive to fix them.