Why? That's security by obscurity. On the contrary, the more people look at the code, the bigger the chance to find and fix any issues earlier rather than later

Why? That's security by obscurity. On the contrary, the more people look at the code, the bigger the chance to find and fix any issues earlier rather than later. Linux is widespread and nobody freaks out about it being open source. And as of the changes - they are reviewed and tracked in version control.