Two students look at the same painting. One says "the figure is isolated in a cold empty space, which is why it feels lonely." The other says "the figure occupies about a twentieth of the canvas and everything around it is low in chroma." Why is the second statement more useful in a crit, even though the first says more?

B. It reports testable facts, separating interpretation so disagreements can be pinpointed

The second can be checked, so a disagreement about it is locatable and a disagreement about the interpretation stays visible as a separate question. The first fuses an observation and a reading into one sentence, and when someone dissents there is no way to tell which half they are dissenting from. Interpretation is not banned; it is kept downstream.