I’m a specialist in living well with dementia (it’s a thing) and this is one of my frustrations! Most prevention is about limiting enjoyment of life and attempting to control every action for decades, and it often comes from fear-mongering that relies on stigma and stereotypes about dementia. My stance is that people can be supported to live meaningful lives with dementia so I’m far less concerned about preventing it than about creating a world where people are accepted and supported if they experience it. Everybody deserves support to enjoy life, with or without a diagnosis.