Is John Deere the curator of the "tractor" product, so they have every right to determine who can repair it? Is Chamberlain the curator of the garage door open

Is John Deere the curator of the "tractor" product, so they have every right to determine who can repair it? Is Chamberlain the curator of the garage door opener product, so they can determine what remotes can be used? You may prefer a world where DRM and the DMCA can be leveraged beyond preventing copying to constrain consumer choice, but I consider that a poorer and less innovative world. https://www.eff.org/wp/unintended-consequences-under-dmca/archive https://www.eff.org/wp/unintended-consequences-under-dmca/ar...