It's the market for lemons problem. If it's your job, it's worth it to learn all you need to know to differentiate between junk and quality. If you're buying one of the 75 different appliances in your home, you'll probably just look at a review site, which can easily be gamed by companies selling junk.

The industry has large, potentially repeating customers, who use the equipment until it fails and who often have the resources to sue if a supplier screws then over too badly. This moves the risk/reward sweet spot for vendors towards the “provide good product for fair price” end and away from the “build shoddy malicious crap and spend your money on advertising.”