Posting via XML-RPC and trackback

I am posting to my WP blogg via the XML-RPC function blogger_newPost($args) in the file XML-RPC.php. It works great, but I also need to notify the ping servers of each new post. I believe that this is handled by the calls

// FIXME: do we pingback always? pingback($content, $post_ID);
trackback_url_list($content_struct[‘mt_tb_ping_urls’],$post_ID);

These two calls are contained in the /* metaweblog.newPost creates a post */ function mw_newPost($args)

but not in the blogger_newPost($args) that I am using.

Question: Should I be using these two calls to notify web update services like https://rpc.pingomatic.com/. If so, why are they not included in the mw_newPost function?