But that's not what the marketing says. The marketing says it will do your entire job for you.
In reality, it will save you some typing if you already know what to do.
On HN at least, where most people are startup/hustle culture and experts in something, they don't think long term enough to see the consequences for non experts.
I'm not sure it's a lot of value. It probably is in the short term, but in the long run...
There have already been studies saying that you don't retain the info about what a LLM does for you. Even if you are already an expert (a status which you have attained the traditional way), that cuts you off from all those tiny improvements that happen every day without noticing.
This goes too far in the other direction. LLMs can do far more than merely saving you typing. I have successfully used coding agents to implement code which at the outset I had no business writing as it was far outside my domain expertise. By the end I'd gained enough understanding to be able to review the output and guide the LLM towards a correct solution, far faster than the weeks or months it would have taken to acquire enough background info to make an attempt at coding it myself.
I'm sure I can do what you describe as well. I've actually used LLMs to get myself current on some stuff I knew (old) basics for and they were useful indeed as you say.
I'm also sure it wouldn't help your interns to grow to your level.