I'm not sure we're talking about the same thing, maybe my use of "lower bar" was ambiguous, and I realize now it has a dual meaning.

What I'm saying is, you have to review code to get it out the door with a certain degree of quality. That's your core product. That's the minimum standard you have to pass, the lowest bar.

In contrast, reviewing documentation is usually less core. You do that after the code gets reviewed. If there's time. If it doesn't get done, that's not necessarily saying anything about code quality.

Even if it's easier to review documentation, that doesn't mean it's getting prioritized. So it's not a lower bar in the sense that lower bars get climbed first.