The post isn't about not teaching during code reviews. It's about not doing it badly, duh? I'm actually shocked at his example. It's obviously bad practice (and just jerk/toxic behavior (don't fucking be coy, EXPLICIT > implicit)). It seems like strawman or cherry picked. I never experienced in 25 years.

Quotes from article

> It’s not bad to “teach” in code reviews

after example of "proper" review

> The learning in this type of comment

Should absolutely "teach" during code reviews. Developers should always be teaching and learning from each other.