To be fair, the author says it's the "_supposed_ difficulty of writing err != nil" and says that the verbosity isn't an issue here. But he also earlier says that he "[hates] having to write pub all the time in Rust" to denote public visibilities. So typing seven extra characters in one place = tolerable, but four extra characters elsewhere = detestable
Writing `pub` is personally more annoying to me than writing `if err != nil`. I understand that most people don't like how capitalization determines visibility, but I think it actually makes sense when you think about it.