is too often treated with contempt

"When people are asked where they get their best idea, they answer, "In the shower." "On vocation" "Doing nothing." This despite the fact that such dreamy purposelessness is too often treated with contempt ."

後半部的"that"是做什麼的?
另外"This"放在這邊我覺得很怪.....

簡單的說,這句話如果是我寫,我會寫成
"Despite the such dreamy purposelessness is too often treaded with contempt"