So what? Unless you're sitting on a secret-until-now extension to CSS that fixes the issues with CSS and is available in all major browsers, then we need these

So what? Unless you're sitting on a secret-until-now extension to CSS that fixes the issues with CSS and is available in all major browsers, then we need these "workarounds" (like SASS and LESS). Or are you proposing that since it is "broken by design" we all stop using CSS full stop and go back to un-styled raw HTML?