S7777
You are talking BS.
Downloading and deciphering CVRs takes man-hours and job-orders.
In any decent a/l these job-orders (MAINT entries on the TLP) will be kept on file for a while.
I recently had a meet with my CP over a young "protected" but under-performing FO. The boss had ordered the tape to be removed as I stood accused of verbal abuse, but did not have it deciphered as he would have needed a valid excuse to do so... And, of course, he didn't have one.
Still I support the monitoring below 10000' as it will definitely help improve safety.