Vetting the cargo

Which is true. It's extremely easy to look straight through something you're not expecting to see, many eyes on their own are useless. Note also the "makes bugs shallow". It doesn't say it makes them easy to notice. It *does* mean that once you know there is a bug, it's not going to be able to hide for long.

Which has been borne out many times. What is the expected life-time of a bug once it's been spotted? Hours? Certainly not much more.

(But then, of course, in addition to the time at the start where no-one knew there was a bug, you also have the long tail where the bug has been fixed, but the fix has not been deployed.)

Cheers,
Wol