Why do people say caregiivng is stressful? Isnt it easier than raising kids?

Huh? What do you mean "caregiving"? Like a job, e.g. Md, rn? Or, say, caregiving for someone with a chronic, debilitating, and progressive disease like dementia? Or something else? All are stressful, for different reasons, including legal and moral responsibility, hours put in, positive feedback (or lack thereof), etc. Raising kids is caregiving- they end up independent; the reverse is very stressful.
Watch this video. http://www.youtube.com/watch?v=wjizv_-ymtw&feature=youtube_gdata_player.