AI isn't inherently unethical. The very premise of saying such a thing is flawed.

Is it unethical to use AI to find new drugs and medical treatments? To use it for physics research? What about regular research? Writing code?

Where do you draw the line?

Also, AI was used to design the current crop of fusion reactors and the full potential of that is only just getting started. If it turns out that AI solves all the issues and generates a working fusion reactor design, it'll make every one of your arguments moot. Because that one achievement will be worth everything. It would "save the world" so to speak (from an energy/emissions standpoint).

Chatting with an LLM is less impact than driving a car. Think about that for a second before you say using it is unethical. It's literally more negative for the world for someone to drive a car every day to work than it is to ask an AI to find something on the Internet or write a program in Python.

Or perhaps your underlying complaint is more about capitalism than it is about AI?