Using AI copywriters have many distinct advantages. Speed and efficiency are big ones. Eliminating the terror of the blank page is another. But, they're not perfect. For one thing they tend to lack creativity and originality. AI can generate content based on existing patterns and data, but often struggles to come up with truly unique and compelling ideas that resonate with all those humans you're trying to talk to.
Another limitation is the lack of emotional intelligence. AI copywriters usually work based on algorithms and data analysis. That's really good for mining the internet for properly formatted sentences. It's a lot less effective at creating material that fully engages human emotions. More simply, they can sound robotic.
Lastly, they may not be able to grasp the cultural, social, or historical context that is often essential for effective copywriting. This could lead to copy that feels out of touch or inappropriate for your intended audience. For example, if you're trying to sell kids toys, the AI might write something in baby talk. That's cute, but may not persuade the parents you need to convince to buy your toys. Human copywriters on the other hand can draw from their own experiences and understanding to craft more relevant and impactful content.