You're right! An editor probably reads more than all their authors combined, and provides feedback on what isn't up to standard. My engineering managers were expected to do the same. An engineering manager who does not read all the code and PRs is as helpless as an editor who cannot read. They cannot know who is performing well, who needs coaching, who is all talk but makes a mess, etc. The idea that engineering managers can be excellent but code illiterate keeps showing up, but makes no sense at all.