Some good points there mate, especially bringing up 'the right to die'. I don't have a problem with a person choosing to die if their quality of life becomes as bad as it does with things like dementia. A doctor at my grandmother's care home have very recently asked my two auntie's whether they want my grandmother to be resuscitated should she become very ill. I don't think they have given him an answer yet, but given that she is 80 years old and her quality of life is so poor, then I will absolutely understand if they give him instructions not to resuscitate if such an awful event ever takes place. Obviously, ideally we would like her to pass away in her sleep. My grandmother's physical health is still relatively good, but her mind started deteriorating about 7 years ago, and it has been an awful journey for her and our family ever since.
My original point just comes from losing other family members prematurely. It may sound like a weird thing to say, but I would happily accept being 'dealt the dementia card' if it meant I got to experience the years 40 - 70, it would mean that you got to witness your children grow up, and some people don't get to experience that as a result of dying prematurely. I'm obviously comparing two seriously crap outcomes with each other, but I personally think one of them is considerably crapper than the other. I know which one I would choose if I was given the choice.
I guess the positive way of looking at what I am trying to say is that they have lived long lives, and that unfortunately more and more people are going to experience dementia as the majority of people are living longer, which is a good thing for the most part. Anyway, I'll shut up now, and please don't think I am trying to denounce the horror of dementia, I'm not.