I agree with the headline, but the arguments in the article are a bit all over the place. Bootstrap, Tailwind and other libraries are abstractions because CSS

I agree with the headline, but the arguments in the article are a bit all over the place. Bootstrap, Tailwind and other libraries are abstractions because CSS as a core skill is quite complex. Sort of like the English language, the ratio of rules to exceptions is too high. If your team doesn't know CSS very well, you have your designers stick to bootstrap, tailwind etc grids/designs. You can make PLENTY of beautiful, functional, readable, designs within the frameworks. When you do, your deigns work in mobile, web and there are significantly less things to worry about.