What he is saying makes perfect sense and is a sensible solution to the limitations of the turntable. Capacitance has an affect on the high frequencies, usually around the sensitive main resonance area on most MM cartridges (for convenience think of it as a low pass filter) and in certain situations can lead to less than ideal results. This is why most cartridges offer loading ranges. If the cables have capacitance higher than recommended capacitance then there is technically an incompatibility issue, especially as the phono stage is likely to add further, not insignificant, capacitance as well. MC cartridges generally are not as affected by capacitance and thus can be a good solution to the limitations of the tonearm cable. This is one of the rare situations where cables actually matter.
I for one find it strange that some of the Clearaudio cartridges have a recommended capacitance of 100pF (such as the Virtuoso pictured) while their tonearm cables can have nearly double that! Insanity.
An example for reference:
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