Why did it make you angry? All gravitationally bound objects orbit around a common center. For the solar system that center wobbles around inside the sun depending on where Jupiter and Neptune are in their orbits. The rest of the mass of the solar system does contribute, but it is generally negligible for most conversations. This is actually one of the ways that exoplanet hunters have found literally thousands of planets in the last decade or so.
Yeah, but a contract that you cannot negotiate before signing isn’t really a contract is it? It is a gate keeper. A gun to the head. An “agree to this or else”. In the modern world, one can do essentially nothing without signing a EULA. Want to get a job without signing one? Good luck. Want to play a game? Not many of them. Want to shop online, look at art, communicate with friends and family. Many of the most integral parts of maintaining our mental health are being put behind abusive “contracts” that strip us of any rights we think we have. Community, leisure, socialization, entertainment, all of the primary avenues in the modern world have predominantly become privatized and every one of those comes at a pretty steep nonmonetary cost.