I find it baffling with all the knowledge we have at our fingertips these days that most people still believe that they are in effect victims of their "genes".
There's all this stuff about epigenetics being affected by simple lifestyle factors, such as dementia risk reduced by 40-60% by diet and exercise and a few other simple lifestyle factors within most people's control and means. We know about heart disease, even neurological diseases, being strongly influenced for the better with dietary changes and regular movement, etc. Even cancer risk can be mitigated by simple lifestyle changes. The Who is pretty conservative about this, but it is generally agreed there's a fair amount we can do:
Four in ten cancer cases could be prevented globally
But any MN thread about ageing is about the inevitabilty of dementia and years of decline and nursing homes, and people really have low to no interest in hearing otherwise. Weird.