These things aren't unavailable in greater society. You simply have a choice. I'm not sure you have as much choice in Amish society, and I think the lack of choice is cruel.

If my elbow is broken, I can't cook efficiently. If it doesn't work correctly, same. If walking to the toilet saps my energy, I shouldn't be expected to do the same.

I should also now mention that elderly doesn't mean you are sick. Loads of folks are busy throughout old age. "sick" doesn't always mean you can't do anything, either, and I'm pretty sure the Amish communities take care of folks that can't.