There are a fair number of Native Americans in Arizona who have no means of transportation, so it can be very challenging if you live in a rural area with limited services, no public transportation, and no car available. There might have been legitimate reason why her family did not visit very often.I'm guessing that the original report of what age she was at the time of her accident probably was from someone who wasn't actually sure and had forgotten her age, because the first quote I read showed it as "about 14 years ago." Particularly if it's an older person telling the story, they can collapse time. Her situation sounds fairly typical of brain damage caused by drowning. https://blog.chocchildrens.org/oxygen-deprivation-near-drowning-can-lead-brain-damage/ CNN says that the court order requires a physical once per year, and that the most recent one was done at a time that would have been a couple of weeks after she was assaulted.
Attorneys have said that she is a member of the San Carlos Apache tribe. If her family live on the San Carlos reservation, that means that the drive to visit would be somewhere between 2-4 hours each way, depending on where the nursing home is located in the Phoenix area, and where the family lives on the reservation, because it is a large one, 1.8M acres, with only one major road running through it. CNN's article said that her mother normally visited 2X per month.