In particular, the every if has a matching else comment doesn't seem reliably true. Many of the unmatched ifs are just simple if (err != nil) { checks, but or other early returns, but outside of those, there do seem to be unmatched ifs.

That said, my experience in enterprise software isn't that extra comments are necessarily present (there was a plague of "// end if" comments in the codebase, but actual descriptive comments were rare).