Also, more likely and non- nefarious, but no less harmful, there's just an academic culture that says "this is what a paper looks like and this is what it contains". Moving from this pattern increases the odds you'll not be published, and it would also likely result in a scandal when someone uses it to point out that the peers in peer review are neither peers (they can't read nor understand nor test the code) nor reviewing (they won't actually put resources into code review).