Have seen plenty of dozer drivers, push the steer clutch levers like crazy when the blade is loaded right up. Of course it doesn't mean a damm, it cannot help the power of the machine, and for any effect on the steer clutch they must be pulled.
With a big load that is when everything stops dead with one track not driving, far easier to turn by side tilting the blade to lift one side and hey presto the whole deal turns toward to more loaded side, unlike the TBAR cyclic.
Are you sure your student is not a dozer driver by perchance??