And why not, really? How does that affect your brother? Why should your brother have a say on what people can or cannot put on a T-Shirt? Creating pieces of art professionally should be paid for. But having some weird right of ownership on what is essentially just a huge number is, frankly, a clutch at best and outright criminal at worst. Digital artwork can be copied at zero cost and artists have to deal with that, not the world has to bend to one particular model of generating revenues for artists.
We need to stop with these schemes at one point and shift to a better market or we will effectively have to ceed all control of data and computing to copyright-control companies.