We have a similar problem now where people are sure the word "podcast" refers to some kind of specialized thing that has to be accessed with dedicated software, as opposed to referring to an audio file that you download from the internet.
The existence of the special term has caused a good amount of harm by enabling this confusion.
I disagree, most podcast episodes and ads mention a few popular options plus “or wherever you get your podcasts” and the proprietary gated stuff hasn’t been doing that well!
The most important part of "podcast" is that phrase you hear so often, "wherever you get your podcasts". It's an open standard, you can pick your app, they can be hosted anywhere. If an audio program is exclusively available on, say, Spotify, it isn't a podcast.
The existence of the special term has caused a good amount of harm by enabling this confusion.