The mother in the link you provided sounds like a nightmare Ironflower and if I were in those poor parents shoes, there's no way I'd be comfortable with unsupervised contact.
So the order isn't always the be all and end all for the parents that's true Bibbity moving and emigrating to subvert a court order does sound extreme but of course we don't know the reasons behind those decisions.
I did post earlier on the thread that even if GP's are successful, parents can make all sorts of excuses as to why the child(ren) aren't available for visits or simply fail to turn up.
GP's then have to return to court to have the order enforced but that wont necessarily improve the situation.
I can understand why, if visitation has been disrupted long term, a subsequent court hearing would refuse GP's contact. Courts take into account the benefits of the relationship the child(ren) had with their GP's before it was stopped.
If, despite the success of the GP's court application, that relationship is successfully subverted by the parents for a sustained period of time, the previous benefits the child(ren) had from seeing their GP's is no longer relevant.
An interesting scenario when we see claims that GP's go to court for power and control. Clearly, even with a court ruling, the power and control is in the hands of the parents.