but some in their thirties are less fit than 75 year olds I know. It has Always been like that. There are many, many folks in their 30s. Of course some of them

but some in their thirties are less fit than 75 year olds I know. It has Always been like that. There are many, many folks in their 30s. Of course some of them are going to be sick - sicker than a 75 year old. A large group of them won't make it to their 70's: A subset won't make it to 40. The 75 year old has been lucky enough not to die so far. I'm pretty sure that when they were in their 30's, they knew an amount of unhealthy folks, too - that were more unhealthy than the 75 year olds at the time. In other words: A 75 year old being healthier than a subset of 30 year olds doesn't prove or mean anything.