CSS is designed for professionals is the biggest ret-con I've ever heard. How much effort have developers spent adding basic functionality like scoping, modular

CSS is designed for professionals is the biggest ret-con I've ever heard. How much effort have developers spent adding basic functionality like scoping, modularity, and variables, features that are table stakes for any "professional" system? CSS was very much designed for amatures at the expense of professionals. Second, to call CSS simple is insane. How many ways are there to create a positioning root? How many ways to create a stacking context. How many different things can using '%' as a unit mean in different context? CSS is incredibly complex. CSS tries to shove these important concepts implicitly away from the developers notice, only to ultimately make life worse for both amatures and pros.