The thing that really drove this point home for me was when I browsed to both websites. Browsing to the Calibra wallet website, the entire site broke because I have blackholed all Facebook and tracking domains through NextDNS. When I browsed to the Libra website to view the whitepaper, everything worked just fine. This is a great demonstration of who is in control of what.
That being said, I think this article also outlines the clear incentives as to why Facebook would like to promote Libra in the first place, which is the data they have the potential to gather through the Calibra wallet.