I love how Bruce steps up to the plate here:
Then he points out some very practical situations in which good HTML brings meaningful benefits. Maybe benefits isn't the right word, as much as requirement since most of it is centered around accessibility.
I hope I’ve shown you that choosing the correct HTML isn’t purely an academic exercise...
Semantic HTML will give usability benefits to many users, help to future-proof your work, potentially boost your search engine results, and help people with disabilities use your site.
I think it's fair to call HTML easy. Compared to many other things you'll learn in your journey building websites, perhaps it is. All the more reason to get it right.
Estelle Weyl has some similar thoughts: