Well, I would have to disagree...
Some websites offer support forums that they maintain themselves, along with selling merchandise. I think there are different internet markets.
Some people would like to build systems going to 5-10 different websites and getting the best deal on each part. Some people like to stick with one retailer. Some people have more experiance than others putting components into a system. There are people who don't know how to add a stick of ram to their pc. I don't know if Googlegear has a FAQ section, help section, or has an email support team for people that may have a problem. A lot of people don't know the difference between a barebones component and a retail boxed component. If someone that needs a complete hard drive set up buys a barebones drive from Googlegear, they might get stuck because they don't have a cable, mouting screws, and hardware...
Some websites go out of their way to help customers and actually enjoy the fact that people are upgrading their computers. I have a feeling that these wholesale hardware shops (like googlegear) are pretty much concerned about the bottom line.
I guess there is a market for everthing on the internet, but the lowest price webstore isn't always the best for everyone...