Don’t think of cheating as an ethical question, think of it as a motivation question.
There are two reasons students choose to cheat. The first is out of your control as a teacher: students cheat because they are desperate. Maybe they are working three jobs, have a crisis, or for some other reason they do not have time to complete what you’ve assigned on their own. There’s not much a teacher can do about that, because you are not the authority over their time.
The second is completely in your control: students cheat because they don’t understand the value of completing the assignment themselves. They don’t see the value of mastering the information for the test, of writing the words themselves, of reading the entire book.
I would never use ChatGPT to write a post here, because the value to me is in composing the words myself. But would a student be tempted to use it to write a formulaic essay for a class? For many students, the answer is certainly. And that mostly comes down to why? Why are they writing? What value does this essay have in their development as humans, or in their future career?
If we take the time as educators to convince students of the value of what we are teaching them, we engage them in a real desire to learn. And with that desire to learn, the impulse to cheat plummets.