If my shitty DLink camera suddenly stopped working, I wouldn't demand a refund - realistically, I'd just toss it in the bin and try to remember not to buy more DLink products. But I probably still would, if they were sufficiently cheap.
I imagine that calculus is similar for most people.
It's tough for security to affect purchasing decisions because it's difficult to measure. I can measure horsepower, megapixels, gigabytes, milliamp-hours, etc. so it's easy to make purchasing decisions based on which of those things are important to me.
But I don't think bricking a device necessarily ties into security in people's minds. If they permanently modified it to always show HACKED_BCUZ_DLINK_SUX whenever I try to load the camera feed, sure - but a bricked camera is just a failure. I don't even know if it got hacked, or if a capacitor blew, or if a rodent chewed through something crucial.