It's in the manufacturers playbook to only sell new equipment and bury the repair information under a vail of secrecy and confusion. Only the "authorized dealers" are allowed access to the "top secret" repair information.
When I worked as a service manager at the local John Deere dealer, we were forbidden by the upper management to even print off repair information or wiring diagrams. We had lots of good independent technicians in the area who purchased thousands of dollars' worth of parts on a regular basis, but they were forced to go to outside sources for repair information.
Some of the bigger farm and ranch operations started actually buying the full JD programs from Canada or online because our own U.S. dealers would not make it available. Unfortunately, many other companies have followed this pattern in an attempt to keep their dealer networks "exclusive".
The Right to Repair legislation has only made things worse. Now, even the dealer techs cannot repair many things because of electronics and system complexities.