I've just said the same to my friend. Surely, under ITV's duty of care, they should get her out.
Someone on the other thread said that Grace lost her dad around this time last year. She's probably not in the right frame of mind to (a) be away from family/home, and (b) to undertake the trials.
She probably thought that doing this will take her mind off things a bit (and bring in a decent bit of cash), but instead, with nothing much to do all day, she's likely just dwelling on it.
Physically, though, she looks so very unwell. It's really uncomfortable to watch her.