LLMs are here to stay. Banning them in your organization is like banning IDEs, because, you know, real programmers use plain text editors and print statements.
Yes, junior programmers will take a bit longer to learn. But assuming they will always rely on LLMs is a bit dismissive. I grew up in Eastern Europe, without internet, and basically without TV either. All I had was books, and I read lots of it. When I came to America, I saw that nobody around me had read anything close to how many books I had read, and I felt a bit smug. But I got over it: I realized that people's brains still mature even if their knowledge consumption comes in form of movies, or the internet, or in the more modern days, TikTok, or LLMs. Yes, maybe being able to read Umberto Eco novels will always be beyond the reach of the TikTok-generation, but then reading Cervantes or Cicero in the original was always beyond my reach. I'm still living a fulfilling life even without first-hand knowledge of the classics, it's entirely possible the LLM generation could become decent programmers without internalizing Kernighan and Ritchie.