No, we do not need sitters while we are at home. At this point, MIL can mostly take care of herself, but needs someone to look out for her and to remind her of her COPD condition.
Three years ago, she temporarily passed out for lack of oxygen, and fell. One good thing we were home to hear that "thunk", discover her on the floor and call 911. She was large-boned, but skinny now, and that saved her from breaking bones in that fall. That event was when she was first diagnosed with COPD.
Her COPD condition varies. She was able to wean off the oxygen concentrator for a while, then worsened and ended up in the ICU once more. After that bout, she again recovered, and was able to move about without the cannula.
Then, two weeks ago, we noticed that she was short of breath and was low in oxygen again. Back to wearing the cannula and being tethered to the oxygen concentrator. Left to herself, she would not know of her low-oxygen condition, and would pass out again and fall.
No, she's not under hospice care and does not have any other life-threatening condition, but at 94-year-old, simply does not have the physical and mental facilities that we take for granted.