Basically, the industry is not investing in new blood.

Yeah I think it makes sense out of an economic motivation. Often the code-quality of a junior is worse than that of an AI, and a senior has to review either, so they could just directly prompt the junior task into the AI.

The experience and skill to quickly grasp code and intention (and having a good initial idea where it should be going architecturally) is what is asked, which is obviously something that seniors are good at.

It's kinda sad that our profession/art is slowly dying out because juniors are slowly replaced by AI.