Sure, but then we wouldn't have known about it. PR and marketing are way more important than building a good product nowadays, alas.
It's like how implementation trumps ideas. You can have great ideas, but with no implementation, nothing happens. Ditto for building a good product. You can build the world's best product, but if no-one knows about it, it's not getting used.
On the flip side, with all PR and no product, you dont have much either. Like you said, an idea only goes so far. You have to have the actual implementation.
Just look at Qtrax. They had pretty good PR, but no product to sell. So they blew their big launch and then blew their relaunch as well later on because their product didn't perform as well as PR said it would.
Imagine how much could've been done if those six had been replaced with programmers and/or designers!