I think the field needs to be established first. What kind of AI? The generative AI that writes for you is a zillion miles from the editing and beta-reading AI many of the above are discussing. And those are million miles away from the killer AI robots. The term "AI" is a marketing buzzword. the likes of which we haven't seen since "digital" entered the consumer's lexicon. It needs several steps of qualification to be discussed intelligently. .
See my above remark. What kind of AI and how is it being used? I'm sure there are plenty of editors that will take your money and plug your manuscript into a AI model that you probably could have done yourself for free. Then there are plenty that use as an assist tool, because as others have pointed out, more clients, more output. Then there are plenty that won't touch it at all, but I imagine that population is shrinking. I'm sure you'll have your big time, best selling, legendary authors who will be fine, but EOTD there hasn't been a massive technological advance in human history that any of the "keep it real" crowd have survived, as far as I know. It's just not economically or temporally possible.
And I'd ask what you mean "ethical" in the overall sense. It isn't a right/wrong sort of thing.