Yes, there is.

> There are exclusive rights, given by We the People, , and not for any other reason than to advance science and the useful arts.

No, they're given by Congress. The power to give those rights is given to Congress by the people via the Constitution, but Congress is the one giving the exclusive rights. And that limitation applies to the subset of intellectual property which is dependent on the copyright clause in the US, which isn't all of intellectual property.

But, in any case, even where that applies, it illustrates the existence of intellectual property, since an exclusive right with regard to something protected in law is what property is.

Real property is an exclusive right protected in law with respect to land. Tangible personal property is an exclusive right protected in law with respect to some tangible object not permanently affixed to the land. Intangible personal property (of which intellectual property is a subset) is an exclusive right protected in law that is not attached to land or to some tangible object.

Also: if you don't make use of it, why do you care what they do to protect it? Firefox and Chrome are open source, and as the refrain goes, you can always remove any DRM bits you don't like and use that.