You shouldn't need to include files individually like that really. The bit in the example is about loading some "preset" files. These files contain variables used by the rest of the theme - changes the colours, but not the selectors.
In your child theme, it should be enough to have a moodle.scss file in your scss (I think that's autoloaded with no extra coding required). From that file you can use @import tags to import all the extra files you need.
e.g. My moodle.scss is:
In your child theme, it should be enough to have a moodle.scss file in your scss (I think that's autoloaded with no extra coding required). From that file you can use @import tags to import all the extra files you need.
e.g. My moodle.scss is:
My styles.scss file has some selector stuff in it, but it also has a link to a moodle/moodle.scss
Which has a whole bunch of includes for the various components
Organise it as you like.
Have a look at other boost child themes to get an idea of what others are doing.