Not really. It's reasonable that it didn't kill them before they had children.
There isn't much selection against diseases that affect us after our children have grown, and what little there is (grandmother care effects, say) was likely swamped in most of human history by other causes of mortality.
Humans are social animals. The grandfather/grandmother effect is much stronger than merely "helping take care of kids", lots of living older relatives can have a dramatic influence on your social standing and therefore ability to reproduce.
There isn't much selection against diseases that affect us after our children have grown, and what little there is (grandmother care effects, say) was likely swamped in most of human history by other causes of mortality.