This is true, but unless you have any print references to hand, there are still ways to make a page less likely to be deleted.
You need a thorough write-up (the sort of depth that the EP page has, for example), by one or preferably several people who are not EA editors or employees, citing references to PP/PC in other online publications. (Any reviews, interviews, write-ups out there?) It also helps if you can attach at least one illustration, link the page from an existing template (is a podcast a "magazine"? I would say so, but maybe you don't, for some reason?) The more other Wikipedia articles link to your page, the more disruption is caused by deleting it. (How many of your editors, narrators and authors have WP entries?) Having an experienced WP editor on board is useful too, both because they can help to make a page deletion-proof, and advocate for us in discussions. ("Pmcalduff" or "Cleduc" may be helpful--they seem to have edited a lot and have interest in speculative fiction topics...)
If anyone would like to start a discussion here or offline about drafting a page for PP or PC, let me know; I'd be happy to help. (Although I'm not the "experienced WP editor" cited above, I have had a few pages slated for deletion and successfully clawed some of them back.)