alt Hacker NewsStealing IP is how American industry got started. Goose: gander, pot: kettle.
It is what built and sustains the movie and music industries. See: work for hire and 100+year copyright length
The tech industry: see: copyright and patent assignment from discoverer to corporation.
I know that corporations forcing me to assign patents and copyright to them was an incentive to take published works from "software practice and experience" and other technical journals, use them as the core of my work, and disclose that source to the company I worked for. Didn't stop them from applying for patents, however.
I think the discussion of copyright needs more refinement. We need to separate the discoverer's need for acknowledgment of development effort from the rent-seeking core of copyright.
The things you listed are very far downstream of the start of American industry, which is in primary resource extraction and processing. Which is you know, what actually built the country. The media industry has always been materially irrelevant, and what we think of as the tech industry is extremely new.
You're right to call out the nasty environment surrounding intellectual property in the US and the exploitation of ideation in general, you just needed a correction on that. Someone else in this chain said virtually the same thing, which is a weird coincidence of historical ignorance. Not too weird, people tend to forget the 18th and 19th centuries happened, and much of the causally important wheels of the world are in the unsexy grease pits nobody wants to think about.