They aren't. This article is a basket of contempt against different targets (men, SDEs, the weather) and makes little sense. The reason why stand-alone web designers "ceased to exist" (they haven't) is because of the proliferation of out-of-the-box front-end frameworks that allow anyone to build a reasonably good site using polished building blocks.

edit: typo

There's some interesting history around the gendered history of computing: https://www.jstor.org/stable/25147356

Ballistics computing was obviously done by women as the men were drafted & overseas, but all paid at 'subprofessional rates'. Another good history at https://confluence.gallatin.nyu.edu/sections/research/how-co...

There are definitely some parallels between OP's article and the history of computing.