well, basically all creative activity is integrating data from different available sources. Shall we forbid people to practice art if they've had any previous exposure to art?
Generative AI is not bad. It's a tool that makes things like writing, coding and drawing accessible to more people. And if you don't like it, don't use it. If we have a system that means people get hurt whenever there's a new productivity enhancing tool, change the system.
And information wants to be free.