> However, think about your own process, at least for me, depending on a feature/the engineer, my code review might be cursory rather than super line by line. The difference? How much I trust that engineers ability in that specific type of code.

The difference is that you can't review your own code, for the same reason that writers work with editors: The reviewer is leveraging their unfamiliarity with the code along with their familiarity with the code's intent and the codebase, as a critical tool.

If it was feasible to get someone else familiar enough with the project that they could review it, I would do that, but at that point, I wouldn't be working on my own.