Mind you I'm not talking of open-source vs commercial, or other types of governance. I'm talking more abstractly about the fact that having source available and open contributions does not noticeably increase the amount of bugs fixed.
It's a discussion about software complexity and logistics of distributed bugfixing, not organisational.
You said “does not noticeably increase”; you need a reference point for “increase”. If you’re not comparing open source to other types of governance, then what are you comparing it to?
It's a discussion about software complexity and logistics of distributed bugfixing, not organisational.