It's not just about children who live away from their parents. It is about children who are in their 50s still working, having their own children still at home, and having to look after the needs of their elderly parents.
My mother is 85 and has recently been diagnosed with dementia. Social services are involved but I still have to support my mum. I do her cleaning, take her to her hospital appointments and do her shopping and washing. This all has to be fitted in with the needs of my own family.