What is the point of seeing a neuropsychologist?

Thank you for your comments. I feel like people look at me like I have 3 heads when I pose this very question.
I heard about an "adult daycare" program near me from someone in a dementia support group. I took my 74yr old husband for an assessment, which showed severe dementia. This was simultaneously shocking and validating. He goes 3 days per week. The first two weeks he complained that they were all crazy and messed up. Now he enjoys it! He's not the same man he used to be. They meet him where he is today. He feels safe and supported, and comforted by the routine. I'm taking his to his neurologist this week for the first time since Jan 2023. I need a letter from him so that I can activate my POA for financial matters. Otherwise, I'm hoping for some advice on whether he is ready for memory care. I don't expect a definitive answer.

This is a short definition of what a Neuropsychologist does:
Neuropsychologists are trained to assess, diagnose and treat psychological conditions with brain-based conditions (e.g., DEPRESSION, ANXIETY, PTSD), Neurodevelopmental conditions (e.g., AUTISM and ASPERGER SYNDROME), Educational issues (e.g., DYSLEXIA, DYSGRAPHIA, IEP/504 accommodations), Neurodegenerative disease (e.g.
DEMENTIA).
I personally have not heard of this specialist before but when my husband had depression, we made an appointment with a counselor who was not trained in the knowledge of diseases such as Dementia. He did get better, but if he is depressed again, I would want him to go to a Neuropsychologist, because we know he has Dementia but what is he suffering psychologically? I see what my husband is going through because he is aware of what Dementia is doing to him and he gets very despondent when he can’t do what he wants - and worse, he knows there is no cure. I believe mentally it is horrendous for him and others to have to face the fact that they are sick and life for them will never be the same. They are afraid because life is changing for them and they don’t have any control over it.
Instead of them living their “Golden Years”, they will eventually not know where they are, who you are, not even know themselves. They will end up only being able to lie in bed and sleep. So the psychological aspect of Dementia is just as important to me as dealing with the caretaking of his Dementia.

I just was told by a neuropsychologist that you can have MCI and Alzheimer's simultaneously. Also, he said that highly functional individuals can score perfectly on the 30 question test and still have Alzheimer's--which explains why I had to fight with the neurologist to be referred for testing. Even Stanford told me I scored "exceptional for a person of my age" and said I was told I would never get Alzheimer's even after 3 different years of testing when I knew I was declining. It was a waste of many years of neuropsychological testing. But, you need a diagnosis for insurance coverage. It took the scans to change the conversations. Yes, it is depressing to learn you have dementia, but I found it comforting to get a firm diagnosis. I am also comforted by knowing that I will not lie in bed for years before I exit this life. The US states that allow 'death with dignity' unfortunately require a max of six months prognosis until death and that you are coherent enough to request assisted death a couple of times before they okay it. Next week I am going to Switzerland to check out Dignitas which doesn't have the catch 22 limitations that exclude individuals with dementia. Unfortunately, the travel costs and fees are expensive. But I will not lay there for years and die the painful for all deaths that my mother and grandmother did. Good luck and best wishes to all caregivers and patients who suffer.