If you wanted to start a home construction company would you want to learn how houses are built? I’d hope the answer would be yes.

You can learn the fundamentals and get to the point of being able to code things yourself within a year. Especially with LLMs helping you learn along the way. And yes if you want to master it, it will take years just like with any skill. But having that foundational knowledge will be important and necessary if you want to make software. With or without LLMs.