Than what?

Even less secure. It was like that and in AI era it is even more true. You never know who ran it in security scanning and misusing the results.

Mutually exclusive imo. Although many use the labeling as an excuse to keep products relying on foss tools close source so no one can audit it.

not even as t approaches infinity?

I would frame it as open source being more accessible to public security reviews or scrutiny. Now, how often do these reviews happen and at what quality is a totally different discussion. https://npub1jaay6dpzydvfz8rs22xg93rl8utesglzmsz8hjhxfjq6k7z7n49qr9sa4l.blossom.band/e635ae706a5fd128aa0f012b9c...

Closed source also. So?