She was running it for her mum who is dying of a lung disease.
She only walked for 6 miles and then bailed. People saw her going straight to a restaurant afterwards so it’s not as if she needed urgent medical help.
I get that she had a sore knee and it was a hot day but I think it’s bad for her fans who sponsored her and she could only manage 6 miles. She fully admits she did no training for it either