Caregiving can be an all-consuming, and occasionally a thankless task. Those for whom you care are inherently net takers, though not usually intentionally selfish. In the end, however, the caregiver gives more and gets less. In many cases that makes the caregiver attempt to provide more than the capacity he or she may have physically or emotionally.
When you consider the challenges of growing older, a variety of unhappy situations can come to mind. Loneliness as we have less exposure to family and friends is one. Less activity may lead to feeling less self-worth. A life of responsibility becoming one of “freedom” turns out not to be the panacea that it sounded like during the years that life felt hectic. Aging sometimes isn’t all that fun.