I've dealt with Alzheimer's patients a bit. My (now ex) BF's father developed it. His wife tried to care for him herself at home, but eventually it meant she couldn't even go out for groceries. Her husband was a danger in the car if she took him along, kept trying to open the door while driving and get out, and was an unmanageable hazard in the store.
If left home he might hurt himself, start a fire, break things. Worse, he could wander away from the house and become lost. Or in the North Dakota winter become frozen in minutes without a coat in -20F temps. Every year the newspapers carried stories of the Alzheimers patients who died that way, discovered in snow banks.
He eventually was placed in a care home. Where I visited him with his son, my BF. We both also were already doing volunteer work there for the elderly & disabled. It was a place with progressive care, and one wing was devoted exclusively to Alzheimers victims.
You needed to key-in a door passcode to enter or leave that wing, to keep those residents from wandering away. Their private rooms had "memory boxes" on the wall outside their doors, a kind of shadow box, that family filled with photos and personal objects the patient might recognize to know which room was theirs, and not enter the wrong one. Because they often wouldn't remember their own name on a door plaque.
Inside their room it was fully open, with the toilet right in view on the floor, not enclosed. This was to remind them to use it, and where it was located. There was a hospital-style drape on a ceiling track they could close around it, but most of them forgot to use it.
My mother-in-law also developed Alzheimers. There were numerous incidents where she got out of her house late at night, her sleeping husband unaware she had slipped away. I had to go searching for her multiple times, eventually requiring the police to find her, wearing a nightgown in freezing weather and completely disoriented.
Yet despite that, it took her husband and 2 daughters over a year to get a judge to sign an involuntary commitment order to a home. You'd think the husband could have done it, but this particular nearby home, the husband's preference, required a court order.
And the judge wasn't persuaded by the doctors' confirmed diagnosis, the police reports, and the testimony of her husband and daughters. He kept wanting more "proof". Well, there's never gonna be any more proof than you have now, unless you want to see her dead body when the police find her outside some night.
But she would appear in court before the judge for a short hearing, and for those brief moments she would be lucid. So the judge used his own unqualified evaluation, ignoring the testimony of medical experts and the police reports.
It was very infuriating. Alzheimers is a horrible thing for the patient, but the family suffers, too. And it's painful & stressful to visit them, when in the later stages they don't even know who you are, and can be largely unresponsive, like in a wakeful coma.