[rochester46]

>For whatever it's worth, we issue CSAT surveys to every candidate who interviews (about 6,000 onsite interviews in 2019)

I interviewed in 2019 and never got a CSAT. The recruiter (and rest of the team) completely ghosted me after telling me an offer was coming. No further communication, and certainly no CSAT.

It seems that could be a huge hole and your entire CSAT program is subject to confirmation bias if you are not even sending them to the people who are most likely to respond with a negative experience. I'm not sure I would trust this "empirical data" you have.