HTML Code In CSS Tutorial Examples Not Semantic

Question

I've noticed that none of the code in the examples or code repos in the CSS tutorial is semantic. There are lots of <div> tags used but no <section> & <article> tags like we were told to use in the HTML5 tutorial. Can someone explain why this is?

Answer 1

In my opinion they use div to make tutorial easier to follow. So we can focus on topic.
In practice we use semantic elements on our web pages, because they are important for SEO

Answer 2

PanicS Semantic elements are also important for code readability. Div blocks are not so easy to understand with a larger amount of code

Answer 3

Because they didn't.