Well, the problem is that CSS is a monolithic mess at this point, like many other standards... If it was made of a selection of loosely-coupled parts, everyone

Well, the problem is that CSS is a monolithic mess at this point, like many other standards... If it was made of a selection of loosely-coupled parts, everyone would be fine with a strong guiding individual streamlining each individual part, and if you don't like part of the design you can just use another solution. Eventually CSS will be replaced by something like this (but it will take many more years, and it will require some rethinking about web code versioning, sandboxing, how low level web browser reflow algos work, etc.)