Not entirely correct, here's an interesting YouTube channel by an ex-F1 aero engineer: https://www.youtube.com/user/Kyleengineers

You're correct insomuch as he's not sharing CFD settings, and is bound by what I assume is a pretty strict NDA, but he still has a ton of useful content. Of course, if you want his true opinion/skills on something specific, he'll do so for a price.