If she is in a facility where she has to be in one level of care or the other, and she wants to stay in IL, she may be able to have part-time help that you or the facility source.
In some facilities, you can pay a la carte for AL aides' services for bathing, eating assistance, etc. morning and night, say, while staying in your IL unit or room, if you can get around by yourself the rest of the day. I don't know the rules wherever she is.
But with two black eyes and a gash in her head, if you/she is thinking she can go on as she has been and not risk serious injury/death/malnutrition/dehydration and all the rest, you're kidding yourself. Under some contracts, the facility can move her to AL without her consent -- I'd be aware of this, stay ahead of the curve, and don't let things get to that point.
In my experience, nurses and social workers are seldom able to break through serious denial by themselves. Does she have friends at the facility? Have you yourself had a frank convo with her about what happens if she falls hard and spends the rest of her life in bed, in pain or a coma?