The reason hooks ( Filters and Actions ) are in these templates is specifically so you don’t need to copy the templates into your theme folder.
The biggest issue with copying WooCommerce templates into your theme is that often time whenever WooCommerce updates they also update the templates. Then you’ll need to bring your changes from the old template into the new template and ensure everything works accordingly so that the overwritten file ‘plays nice’ with any other Woo changes.
The idea with these hooks is that you should be able to move them around in a different order ( should you need a different layout ) or replace the output with something you may need. The woocommerce_before_shop_loop gives you access to modify the result count and ordering filters. Maybe you don’t want to show result count – so we can remove it like so:
remove_action( 'woocommerce_before_shop_loop', 'woocommerce_result_count', 20 );
The next big hurdle is finding out what each hook does and how you can use them to your advantage.