No kids means nobody is going to be putting my ass in a home.
People usually go into nursing homes because they can no longer live independently. When you get to that stage, if you have no kids, and do not have the huge amount of money needed for a nice assisted living arrangement, you would likely be put into a state funded home, which usually are not places you want to be.
I see where you are coming from, but I've just heard too many stories of elders having no one, and spending their twilight years alone, or in sub standard conditions.