That's the monopoly for you. On the radio side, the BBC effectively outlawed its competition ("commercial interests", as they called it) until the 1970's. I would bet the story is similar for TV. Sadly, the Britons just have never experienced much "choice" until those restrictions are lifted, and so they are under the impression that the BBC is some sort of deity. This is fueled by entire generations who, in fact, had no other options but to watch the BBC, and the network could continue to be fed by the British government as much as they wanted. In the US, we accuse the media of being misleading, and we hold them accountable. In the UK, the BBC has only itself to consult before publishing stories, and they have been responsible for so many hoaxes (such as the Spaghetti growing on trees prank), and yet the BBC is not just above the law, they are the law.
It's the practical equivalent of if PBS/NPR suddenly decided to broadcast whatever format they felt like, and then require a license to receive that content, and then saying that anyone running a commercial operation (like ABC/CBS/FOX/NBC, for example) without the permission of the PBS should be shut down. Now imagine that Bachelorette, Young Sheldon, Chicago PD, and Masterchef was all ran on PBS, probably with some changes to appease the station and the government. There would likely be 7-10 stations labeled as PBS, and that would be the only reliable way to recieve content. On the radio side, we would see NPR probably having quite a few subchannels, with translators all over the band, and they would play all sorts of music. Although it sounds like a good thing, the reality is that this alternate NPR would've ran out the other stations like the BBC did, and if there was any other stations, it would probably be a conglomerate who runs it. (In London, as an example, KISS, Classic FM, Talk-Sport, and others are all massive corporations that the government made excptions for. Only recently has individuals been able to put a station on air, and the story behind "Radio Jackie" on 107.8 is a great testament to how the small people won their rights). So in a world where NPR was all-ruling, an Audacy and an iheartradio would crop up late in the game, and they would still be at the whims of NPR. (Remember that in the real world, NPR wants to screw over Franken FM's. If the US went the way of the UK, the Franken FM'S would be wiped off the map decades ago.)
Considering that analogy, we can see how the BBC has truly brainwashed its own audience. As so long as these people continue to be complacent on the matter, the BBC will always raise new generations to continue "supporting" the service. Not to mention that the BBC has a pretty good deal: Speak highly of their government, and the government will have the BBC'S back every single time.