> The idea that some CDs have data that has "intentional errors within [the] audio" and that the data must be interpolated seems very strange to me.
It is done by the CD manufacturer as a form of copy-prevention. It doesn't work very well, and it increases the likelihood that the CD will eventually become unreadable due to the accumulation of (other) errors.
Audio-CD *players* -- you remember those stand-alone things that people used to attach to audio systems? -- (as opposed to computer CD drives) do two different forms of "repair" to an audio stream during playback (which is NOT the same as ripping): error correction, and error concealment.
Error correction uses some additional information encoded into the disc, over and above the actual audio data, to reconstruct the original bit stream exactly. When that fails, because enough errors have accumulated that the original bits cannot be computed, the player will interpolate data by averaging adjacent information and attempting to construct a smooth waveform according to some specified algorithm. The result is supposed to be an inaudible repair, but it is NOT the original data. Computer drives might do error concealment when used as players, but they certainly do NOT do it when used for ripping.
"Ripping" is an attempt to treat an audio CD as if it were a data CD, and you would not want your computer interpolating stuff in programs and other files just because it had an error: you'd want to know about it, and you'd want the drive to retry the read until all the error-checks were satisfied.