> Don't load a JavaScript framework for form validation if using `required` and `pattern` are enough. Don't write your own sorting algorithm unless it's faster than qsort(). Don't write your own data storage engine if SQLite covers your use case.

Most software is made by stitching together off-the-shelf components. I don't think people on the web need a warning about not writing too much custom code. The HN complaint about the web is regarding bloat from people who walk the mainstream road of web development. Loading a bloated framework to do whatever is an example of such mainstream development.