I never had an issue with the premise of the episode itself. My issue is that it's not a useful class identifier or analysis, by leftists like Amber when she's doing more serious writing outside of comedy podcasts, and that it combines the necessary managerial role, something that was already observed in Capital by Marx as the stock corporation grew and became fully realized in 20th century shareholders management, and where petty bourgeois would work better to refer to them, with "professional", which is based around the culture shared of similar educational setting to the managers and similar basic cultural outlook and affect. It's not that the culture surrounds the class, it's that PMC assumes there's a coherent class there when there isn't. Proletariat members of the PMC (which exist because of the innate focus of the concept on culture itself as class) are not able to indulge in the cultural consumerism, do not have that class status or relation to production. It's entirely fine to criticize superstructural things-that's a large part of the podcast, after all. Managerial class would work better, since that's the vital part of it as class in relation to production.

The episode itself shows some of its actual utility though-for some professionals, themselves well off, to try and pretend they're not actually professionals and anything like the peers they criticize.