If it's code for a pacemaker, it should be reviewed by multiple humans. If it's code for an unimportant side project, I will never read it. Between those extremes are shades of grey.

Part of our job in this new era is to understand the worst-case consequences of a bug given how the code interacts with the world, then allocate our effort based on that understanding. This can only be done on a case by case basis.