When I was growing up the people I knew and lived with and socialised with and went to school with (or their parents) were, to a large extent, imbued with the ideas behind the
Protestant work ethic. I think this is extremely common. My father ran his life by it - hard work, early to bed and early to rise, frugality, sick people were attention-seeking shirkers and were usually assumed to be making it up and were just lazy. He would not have been happy to learn that some people simply couldn't exercise at all - it would go against all his beliefs about the right way to live one's life and he simply would not believe it. I think this is extremely common. Activity and being busy are right and good, sickness and immobility are wrong and evil, and nothing would have changed his mind.
I think the powers-that-be share these beliefs too. The poor, the long-term ill, the unlucky, are architects of their own misfortune in many people's minds. Compassion is in very short supply, in my opinion.