Two family members lost their minds slowly, until they became walking ghosts, nothing left but meat. I've been horrified. They were heavily doped with drugs eve

Two family members lost their minds slowly, until they became walking ghosts, nothing left but meat. I've been horrified. They were heavily doped with drugs even though they were well over 80 years old. 70 strikes me as an arbitrary boundary after which I'd rather die if I am to, than torture my family and my society around me with my presence. In a less interventional medicine system, my elder relatives would have been diagnosed "old age" instead of some obscure illness and left to themselves to die earlier (oh horrors!), sparing everyone and themselves from the tragedy of the mind dying and the body not dying.