It’s not just Bikinis. It’s all swim wear, saunas in Europe, baths in Japan. It’s just socially acceptable and expected in the right context, and that expectation plays a huge role in comfort. The context seems to flip a switch in people’s brain.
People want news. It’s a need as primitive as gossip. In fact, gossip is probably the answer to your question. But gossip is neither fast nor reliable, so people will inevitably invent news organizations to satisfy the need, as much as we have invented agriculture to satisfy our need to eat.
Perhaps when you say “news organizations” you intend a much more narrow definition, like maybe a “privately owned news organization”? That’s a dramatically different question though.
Assuming a constant rate of change of anything involving people over a period of ten years is straight up nonsense.