I agree with you. an LLM will do what you guide it to do, give it the proper guardrails and instructions and it will produce code in any style you wish.

Be it abstract or simple, more comments or no comments, adhering to clean code principles or following whatever software architecture you want...

Include style guides, static analysis and formatting tools in the development loop, use skills and hooks properly... I started to have a much better time with agentic coding once I spent time setting things up properly for my projects and writing down how I wanted things to be done.