No, they didn't confuse it with a vegetable---apparently Zimerman recently modified his instrument and the piano smelled of glue. As a result he ended up travelling with just the mechanism, fitting it by hand to the boxes at concert halls he plays in.
A flexible TeX based system would re-run TeX when the layout changes. Can it be done quickly enough with modern technology? probably yes. Is it worth the trouble? I think the market has spoken and the perceived improvement was not enough to justify the trouble.