Some commenting is okay and necessary. The point is that generally, if you are adding heavy commenting, you can probably refactor the code in such a way that commenting is not necessary. Even in a large codebase.

More seriously: yes, you should name functions/variables/etc. reasonably. And often if you write a comment, you will find you are actually explaining away a wart. But often you need to document business logic, code that needs to be written in a less than clear way for performance reasons, explanations of why you chose approach A instead of what would seem like another perfectly reasonable approach B, URL links for standard doc PDFs, and a million other little things.

There are comments that aren't necessary if you write your code better, but there's others that are needed even if you write your code perfectly.