Two key points.
"Cheap devices typically manufactured in China have hardwired default passwords, which are almost impossible for the user to change. In order to avoid this, you might want to seek out US-based products with better security"
and
"was able to take control of the security camera he’d just purchased off Amazon for $55"
This isn't really a story/news, this stuff has gone on for years, it's just making its way into mainstream media finally. As much as I like Gizmodo - been an avid reader for over 10+ years ever since my post grad days, they really suck like most mainstream media/blogs now. The writers are childish and composed of millennials that write half ass articles - like this one.
Bottom line - the story is about a guy who connected a shitty camera, did not change any passwords, and did so to show how quickly this can happen. Gizmodo then writes a story like this is a surprise, late breaking, blah blah blah.
Buy crappy imported hardware from china and don't change passwords - expect to have a security breach. I mean seriously, the linkedin hack over the summer showed 800,000 accounts using "123456" as their password with the second and third passwords making up a total of 300,000 accounts being "linkedin" and "password" in that order... Even without these backdoors the general population is still to stupid to setup secure passwords thus making even hardware without a backdoor easily accessible.