If all the siblings pay the premium together, the cost of the policy over 20 years is usually less than what a few years of long term care would cost out of pocket. It doesn't erase the issue but it can ease the impact. Work with a financial advisor who is familiar with the various policies. Laws vary state by state. Coverage varies with each insurance company.
Care is a personal choice.
No one wants to go to a nursing home. These are some of the basics to cover. Long-term care insurance is like any other type of insurance. If you never need it or use it, you threw away you money. But one year of needing it can pay for many years of premiums.