In most cases, there is too much interaction between the controls to let you use the freezer as a freezer. A controller is just cycling the power on and off, so don't depend on the freezer side working right.
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
"I would like to die on Mars, just not on impact." Elon Musk