Why couldn't Google just sell their hardware via other - more experienced - companies in the retail world?

I purchased by Dell screen from a store that was not Dell's, Likewise for my Vizio TV, Nintendo Via, HTC phone, etc.

I'm sure we could all live buying Google hardware from a non-Google retailer and so could Google.

(Not saying Google would do that, just saying whether or not they open their our branded retail store is really a non-issue, it should be more about it been available in any bricks'n'mortar store at all)