It was prosumer, not professional.
It's not really "suggested" as much as it generally is respected by its owner for doing a good job. And picky owners, not Joe Sixpack.
Code:
JVC S-VHS (NTSC) without TBC
These are prosumer decks that pre-date the TBC/DNR system. Although these decks are often
considered inferior in some ways to latter-generation JVC VCRs, the playback is still quite
excellent. These decks have known-excellent tape transports, which leads to stable playback
that can, in some circumstances, with some tapes, outperform the later JVC TBC models,
and provide a comparable EP/SLP performance to Panasonic transports.
JVC SR-S365U
JVC HR-S5000U
JVC HR-S5800U
JVC HR-S6800U
JVC HR-S6900U
JVC HR-S7100U
JVC HR-S9400U
I've never heard of a JVC S-VHS VCR refusing to play the 'C' tapes, but know that this VCR does (as far as I know) predate the C format. So maybe that has some bearing on this issue.