addCoreResources() does not load resources on non-Civi pages in WordPress

The wiki and docs say that you can add Civi resources to any WordPress page by adding CRM_Core_Resources::singleton()->addCoreResources(). This currently has no effect in WordPress pages that lack any other Civi content (shortcodes etc).

I've tracked it down as far as CRM_Core_Region:render() not firing, because Core_Page->run() doesn't fire. These do fire on a WordPress page with a shortcode. Haven't got any further than this, yet.

Wiki ref: https://docs.civicrm.org/dev/en/latest/api/usage/

Issue here: https://civicrm.stackexchange.com/questions/2475/how-do-i-access-the-javascript-api-via-a-wordpress-theme-template