The benefit here is designers learning to code. It was always weird to me that designers were shaping software without knowing how it was built. I'm a designer btw.

However, designing in code is technology-first. One could argue that the purpose of design - to shape the artifacts for human purpose - is better done NOT starting with the strict rules of code. Pen and paper is still hard to beat, not for anything that looks nice, but for helping your mind forward.