As the African proverb says, "It takes a village to raise a child." It also takes a village to care for an elderly person with dementia as well.
Caring for someone with dementia usually requires a team of in-home caregivers, outside healthcare workers, and family members. The patient must be under constant supervision, take multiple medications, be fed, have their hygienic needs met, and be driven to and from doctor visits.
All the while, the patient needs to be given the opportunity to spend the rest of their days as happy and comfortable as possible.