That... isn't at all true. Open source software and Free software have a fundamental difference in ideology. While open source software is about practical advantages (security, interoperability, portability, etc), free software is far more interested in the ideology behind it (freedom, user rights, transparency).
Corporations using and contributing to open source software, as well as closing parts of it to profit, is open software working as intended.
The FSF fought against this tooth and nail, and publishes software licenses that make it as hard as they can to mix free software with non-free software.