I literally explained this above. No one is trying to rush the students or punish the slowest writers. It's because time is finite and having tests sized so tha

I literally explained this above. No one is trying to rush the students or punish the slowest writers. It's because time is finite and having tests sized so that it's impossible for the slowest test-taker to even feel rushed means that the test time period needs to be much longer. That means higher costs for paying the proctor and makes them much harder to schedule since you need enough very long non-overlapping test periods that every standard class scheduling slot has a corresponding exam period (and think of midterms -- those often have to fit in a standard class period, or else if someone takes longer, that might blow through another class).