Reminds me of Linus' comments[1][2] on pull requests in the kernel's GitHub mirror. The fact that you can't disable pull requests give the impression that it's mandatory to allow anyone to request changes and for you to review them.
Yeah, especially as you can disable all the other tabs (beyond code). I think that’s been successful in encouraging open contribution projects, but that has also impacted the notion of what open source means to people in a way that isn’t just good.