While there is some truth in the premises offered, articles like this one only serve to fuel conspiracy rumors and encourage players to think of themselves as victims rather than take responsibility for their own account security.
Gaming companies do place some of the blame for a compromised account on the account holder, and for good reason. The hacker certainly didn't gain access to your computer because of their actions, and their computers that store your information are as yet untouchable.
The browsers you use, sites you visit, firewall settings, anti-virus software and update practices are just a few of the ways that you contribute to your own hacking experience.
Sharing your account information with your lover, best friend and mother may sound safe, but you don't control the security of their computers, or their friends' computers. The majority of people I know who have been hacked signed into their accounts on their sibling's computer or a publically shared machine.
In fact, NASA ended up with a keylogger targeted at gamers on the International Space Station. It traveled aboard on the laptop of one of the astronauts. You just can't trust any computer that isn't your own.
It may be hard to hear, but a hacked account is because of something you did, whether it was an unfortunate stroke of luck, such as stumbling onto a redirect on a legitimate website in the small window before the site addresses it, or a serious oversight in security on your part.