While I wouldn't write this much comment, I can see a use for this: navigation. If I'm trying to quickly find the part I want to modify, the comments do help me

While I wouldn't write this much comment, I can see a use for this: navigation. If I'm trying to quickly find the part I want to modify, the comments do help me skim through quickly and zoom in on the part I care about. It's the same reason a blog post is often broken up into section headings. Without the comments, I'd have to spend a few extra seconds trying to map chunks of the code with my mental model of how linked lists work. Those few seconds can interrupt the flow of work. So I'll disagree with the notion that only illegible or unreadable code needs comment.