I think you've fallen for that classic misunderstanding that your own usage and preferences are shared by the 'masses'; or if they're not yet, they should be, and it is inevitable they will be. This is classic of tech-heads, who also often don't take into account the context and society in which tech is used and consumed.
Tech doesn't exist in a vacuum. The latest tech doesn't have all the answers. Sometimes a non-tech or low-tech solution does offer key benefits that other, more modern options don't. Further, not everyone will gain from the claimed benefits; some may simply not care about them; others can't afford it; others simply can't operate it.
Radio, I would argue, is in this bucket of effective low-tech devices which still has a role, and which will remain for quite some time. Sure, podcasts and audio streaming is growing, and I'm someone who listens to podcasts whenever I'm in the car, and typically only listen to 'radio' (via a Google Home Hub) when in the kitchen. But I know I'm not representative of all New Zealanders (let alone those in the rest of the world) so don't assume to know what they all want.