The ideas have always been physical. (Reality is unlike classic neo Platonism or neo Aristotle Christian philosophy...where they are metaphysical and beyond physics.) The only thing that changed was when the ideas left the privacy of one's own brain, and got marketed or advertised to the public. Once that happened, the ideas belong to others who got it ...(whether by money, trade, or free). Yes people make products out of ideas. (Example: music, books, artworks). If one lived privately, as a hermit, kept silent, and to themselves, if economy shut down, if there where walls, chains, muzzles, censorships, drugs, anything to contain people, ideas could never be products. They would just be private prayers or dreams. But people talk, they write, they create, they record, take pictures .....sometimes for free....sometimes they charge others money to do it. By doing this; ideas spread to others and get owned by others. The Bible used to be a book owned only by the universal church government at one point. But then came printing press; new secular governments along with new laws about free speech and other rights and freedoms. Now, everyone owns the Bible. It's no longer exclusive. Everyone now owns god and all the ideas about god. These "rights" are actually about authority that permits one to do things. But once it goes on air in public media, or once someone buys it....that's it. The consumer now owns it. No stopping people from copying, re-creating, discussing it, making their own improved versions, ko versions, making a sequal.... Nope. I own all the animation g1 episodes. I own all the comics. So do millions of others. People can do whatever they wish. (The illegal part is claiming to be someone else or taking credit for other people's works).