That is true, but quite a few of the $20 working 60-pin drives have bad blocks these days. The $20 Apple ROM equipped Quantum 230MB drive that I have for my second IIci could not be formatted using HD SC Setup. APS PowerTools was able to format it, but I lost about 10MB of free space, due to the damaged blocks.
Hence the reason why we're so interested in finding alternatives.
-J