Should our instructors really expect us to be perfect in order to pass???

So, my class has recently started back up for our final semester, and this semester we have an instructor that we had our first semester as well. As soon as we started back, we went head first into Advance Medsurg clinicals with no refresher days in the lab or anything. Mind you, the last time we had any Medsurg instruction or clinical was in March. Although its been so long since the last time we had Medsurg, I have not noticed any major regression with our class, or have seen anyone do anything unsafe. Yet, our instructor has managed to make two people cry in one night, shun someone for not knowing one lousy answer to a question while being grilled, and made a comment to another student that she doesn't know what happened to us between first semester and now, and that she doesn't feel comfortable passing all of us at the point we are now, and we only have three weeks of clinical left and then we are in our preceptorship. Correct me if I'm wrong, but I didn't know that as nursing students, we were expected to be perfect to pass. I thought that as long as we are SAFE, know the basics and look up the right answers when we don't know them, that we are fine. After all, real learning only begins after you graduate. Am I wrong?