I disagree with this strongly. Isolated individual facts don’t give you an overview or macro-structure to place the facts within. It’s very inefficient. Can only speak for medicine but using another persons deck is ‘quicker’ but performance is so much worse. Even in just learning how to summarise the info for yourself you gain a lot.
I am also speaking from experience with medicine, there is no way I can create cards as good as Anking's and still have time left to actually study/review.