Earlier quoted context omitted.
Not working for twenty years (in the prime time for earning money) is not "stumbling once".
In that case the issue was that he had to stop working to take care of his mother. In most civilized countries, his mother would have sufficient help from government healthcare.
I am in New Zealand, which is fairly civilised, and I think your statement is mostly wrong.
Firstly, I have seen people get some government help, but it is rarely enough. Even with government help and sharing the load with siblings you may still need to help your parents full time.
Secondly, many people choose to look after their parents because they want to, or sometimes they don’t trust that others will give them the same quality of care. Even with high quality private care, I have seen plenty of children dedicate a lot of time to their parents (similarly friends looking after sick friends).
For some children it is acceptable for them to hand parents over to aged care, provided by the state. Many other children choose instead to do as much as they can to help their parents, often because they have experience of the systems and see the reality of overburdened elderly care.
When infirm people have nobody else to help them except government services, their care is sometimes of low quality, although still expensive for the economy to provide. A mature economy with many elderly perhaps doesn’t have enough people to provide the number of dedicated hours needed to support all of their infirm? I did a quick search and it looks like New Zealand spends about 1% of GDP on long term aged health care. That seems surprisingly low to me - although I didn’t look at how much other countries spend. https://www.google.co.nz/search?q=crown+expenditure+%22aged%...