Would a female in stage 5 Alzheimer's be able to clearly think about and articulate how she feels about her future with Alz?

I know this forum is for caregivers, and I am not caregiving for my friend, however, thought maybe someone would insight into my concern.

I have a friend in her early sixties who has early onset Alzheimer's. The managers of the in home caregivers are saying she is at stage five. I have heard that people go through the stages differently, however, I would think there would be at least some criteria that shows, yes this is clearly stage 5 or whatever stage they are in. I know I am not a doctor, not even in the medical profession. however after watching a narrated, video a woman made of her mom's "journey through Alzheimer's, and talking about, and showing of abilities, behavior, etc. at each stage, (at stage five, this woman's mom could even communicate what her thoughts or feelings were about her diagnosis). So I have hard time believing my friend could be at stage 5, as she can clearly articulate (although she doesn't always remember all the words) how she feels about her future, the (I feel sometimes extreme) limitations the in-home caregiver management places on her. I know that neither she nor her mother that she lives with, have a doctor directly involved with their care, and as far as I know, neither of them have been to a doctor in at least several months. (Except for my the daughter, my friend having a physical medical issue she went to the emergency room for one night). My concern is that the in home care management (who I am pretty sure have no medical training) are saying she is at stage five in her Alzheimer's so they can say she needs more care=more money.

Any thoughts anyone has on this would be greatly appreciated.

Thank you,

NC