Why should it? SCSS is already the default syntax, and all the Sass documentation is written in SCSS.

Think of Sass Indented Syntax as a power tool for advanced users. (Although I usually use indented, there are times where I prefer SCSS instead)

Why would it recommend one over the other if it's something that's most definitely a user preference? I wish we had stayed with the first syntax as it's "cleaner" in my opinion, but at the end of the day that's exactly what it is: my opinion.