My uncle, alas, was not disposed to admit that his younger sister was right about anything. (There is a small, mean corner of my brain that is savagely glad that his final months were so bloody awful as a result of his sons not getting his 90-year-old ass in-home help when his wife was dying of cancer [she was being cared for at one of her sons' houses, so she was fine], since he was utterly useless in taking care of my grandmother proactively.)

This just makes me more determined to be as polite as humanly possible when ill/requiring care of any sort.