First, you can't compare the wealth an advantage IP represents now to what it was before the 1960s. It's a ridiculous comparison when you look at the amount of economic activity that depended on it.

Second, the list of underdeveloped countries that care about US IP laws is non-existent. The US doesn't care. It only matters when the country is wealthy and advanced enough to do something with the IP that it matters.

Third, I don't see how it being in the US's interest to protect their IP makes protecting the IP wrong.

Forth, you've rebutted none of my actual points, and ignored my last sentence.