AI is just a tool. It has no purpose whatsoever other than that which you give it, in order to achieve some objective that you determine. Thus there is no good or bad purpose for AI. Your use case dictates the ethics of using such a tool. If you use the wrong tool for the wrong job, that's not the fault of malicious AI, that's all on you, bud.
AI is called an intelligence for a reason.
If you own a slave and get them to draw for you, is the slave a tool? Did you create the drawing? Are you allowed to take credit? Man vs machine makes no difference, because either way, it is an outside entity. At least with a brush, you still used your own brain.
AI is not just a tool. If you rely on another intelligence, you will have only traded your own away.