Rachel Andrew, once again, seriously hits the nail right on the head:
There is something remarkable about the fact that, with everything we have created in the past 20 years or so, I can still take a complete beginner and teach them to build a simple webpage with HTML and CSS, in a day. We don’t need to talk about tools or frameworks, learn how to make a pull request or drag vast amounts of code onto our computer via npm to make that start. We just need a text editor and a few hours. This is how we make things show up on a webpage.
Learning the basics is not only a great entry point, as Rachel points out, it’s also a vital skill if you want to become a truly great web developer.