How much sympathy do you have for someone who has never made any effort to look after their health (exercise, healthy diet etc) and is now beginning to pay the price?
Overweight - joint issues, beginning of diabetes, very high blood pressure, mini strokes etc yet still refuses to try to eat healthily. At a restaurant, orders meat, veg and rice but asks for it without the veg and with chips instead. Then orders a big dessert. Complains when they stay with us that we give them too much salad and they're sick of eating it. (If we have a cold meal, we always start with salad.). If we're given a salad at their house, they take more dressing than salad. Comments that they're not served a dessert with every meal, biscuits and chocolate with every cup of tea.
No exercise whatsoever, drive everywhere, complain if I suggest walking to the bus stop. Anytime I've tried to encourage a bit more activity or slightly healthier diet, I'm being rude, disrespectful, insulting, how dare you speak like that to me etc etc. Any sporting activity mentioned/that the DC do is met with derision. They spent 10 minutes yesterday describing in great detail to my 6 year old what injuries she could get from her favourite sport along the lines of she could break her back, kill herself 
Now the health issues are creeping up in combination with old age and I'm supposed to have endless sympathy. Frankly, it's a bit wearing. Am I just a heartless cow or do other people struggle with this too?