If you're not planning to make any changes to the default theme then no there's really no reason for you to create a child theme at all. This is only something we'd recommend if you are adding functions or changing the layout, because when it comes time to update your theme, you will lose any modifications made (a child theme will prevent you losing all of your changes).
As per the
WordPress codex regarding child themes:
A WordPress child theme is a theme that inherits the functionality of another theme, called the parent theme, and allows you to modify, or add to, the functionality of that parent theme. A child theme is the safest and easiest way to modify an existing theme, whether you want to make a few tiny changes or extensive changes. Instead of modifying the theme files directly, you can create a child theme. A child theme inherits all of the templates and functionality from its parent theme, but allows you to make changes to the parent theme because code in the child theme overwrites code in the parent theme.
Our own documentation explains the process of customizing themes/creating a child theme
here. I hope this information helps. Thanks.
