How do you even know that the US has not been innovative despite the patent system. That if the patent system did not exist, it would have progressed even further than it has.
In no way was Adventured arguing that because of the patent system, the US became a bastion of innovation.
As the original comment pointed out, the US has been successful, but it could be for many confounding reasons.
One of the points of patent law is to distribute the rewards of invention, so individual inventors - not corporations - benefit from their creativity.
Patent protections aren't the only element in this, but they're one element, and a lot of 20th century products would never have appeared otherwise.
It's simply not historical to argue otherwise.
The 21st century works differently, but with the irony that the FOSS people claim their way is absolutely correct, and no other system is workable.
Sharing certainly works if you have a day job that pays your bills. But innovation is not invention. Patents were originally designed for creative inventors, not commercial packaging operations like [insert corporate giant here], or freeware mash-up/YetAnotherFramework projects.
In the US at least, the system has become a joke. But just because it's broken doesn't mean that inventors shouldn't be rewarded and protected somehow.
The US economy has been an extreme bastion of innovation for 200 years, while also having a robust patent system (one that has only recently become particularly stifling). In fact I'd argue there has hardly been a greater bastion of innovation in world history than the US economy from 1800 to 2000 or so, very few countries compete for that title.
I'm very much not a fan of how the US patent system works today, but I'm finding it difficult to prove your claim based on historical evidence.