That is what assembly shows the student. Now Microsoft has some very complicated tools to insert that code with. If you understand programming at the most basic level then other languages are not as difficult. You can insert fast and compact machine code into other languages. Once you write a bit of code you can save it to your library and call it with a few words.
Some jobs have nothing to do with PCs and require machine coding.
There are many jobs where people program in machine code. Many microprocessors are used in industry. I know a man who is a supervisor for a medical equipment company. He loves for people to study assembly. It is necessary to program some of his equipment in machine code.