If there is a disease that has caused a large number of older people to die, and many of those older people are grandparents, and many grandparents help out wit

If there is a disease that has caused a large number of older people to die, and many of those older people are grandparents, and many grandparents help out with childcare, and having to work with less help than previously re childcare is likely to cause a problem for a lot of people, I'm not seeing the problem with assuming a correlation given that argument and its conclusion. Which premises are you disputing?