You can split the second group into two sub-buckets.
Junior devs: who have limited experience or depth in knowledge. They are unable to analyze the output of AI coding agents sufficiently to determine long term viability of the code. I think this is the entirety of who you're speaking of.
Senior devs: who are using it for more than a basic task executor. They have a decade+ of experience and can quickly understand if what the AI coding agent suggests is viable long term or not. When it's not, they understand how to steer it into a more appropriate direction.
Junior devs: who have limited experience or depth in knowledge. They are unable to analyze the output of AI coding agents sufficiently to determine long term viability of the code. I think this is the entirety of who you're speaking of.
Senior devs: who are using it for more than a basic task executor. They have a decade+ of experience and can quickly understand if what the AI coding agent suggests is viable long term or not. When it's not, they understand how to steer it into a more appropriate direction.