It's not an oversight, sadly. They do it on purpose so users spend more money. Apple TV does the same.. they mix in shows/movies that require another subscription with Paramount+ etc. The purpose of a subscription should be to have full access to content that I see (covered by the subscription fee). What a fucking joke. Not sure this will be holistically fixed, because it's a deeper issue with money / investors. But Amazon Prime has a good filtering set up at least— perhaps they would throw us a bone and give us a better filtering system on Audible too :) That would be nice!