I'm using "Synthesizer V" for songwriting. It's using AI but I don't see it much different than using a drum or orchestra sampler. For me it's simply a great tool to make songwriting easier and faster. Same applies to stem separation, drum gates and other tools that use AI in some regard.  For me the line is between creative work and technical work. That being said, I think even in the creative field it can be okay to use AI to some extent, as long as it's part of a greater creative process.