@jh24 That’s the majority of it but there usually is a lot more involved. Because someone can do do all of those things and still cause stress in other ways, like being late or withholding cs, refusing to discuss important issues etc.
@jh24 When one person is willing and trying to do all of the above but the other deliberately makes things difficult or refuses to cooperate, it is helpful to gather as much information as possible on the subject in order to try to make it work. Continuous learning and growing can never be harmful. There are always new tactics to try, new ways to alter perceptions, psychology to explore. Divorce happens for a reason, and often leaves behind stress, disagreements, hurt feelings, etc. Both parties are not always willing to "be good people," or "treat your child's other parent with respect" or, they may be too focused on blame, being right, proving a point, etc. to notice the damage being caused. These books aren't just for people who don't know how to follow a "few simple rules." They are also for people trying to work with someone else who can't.