Hi,
That's not 100% true.
As you already bought all extensions, you have the Meta Box Builder extension which allows you to create meta boxes and custom fields with UI. You don't need to code if you use it.
You also don't need to code if you use free extensions: MB Custom Post Type or MB Custom Taxonomy.
Other extensions require you to add custom code to your themes/plugins. Please follow the documentation of each extension for more details.