You can repeat Ernest Hemingway "The old man and the sea" from the 1st word to the last word 10,000 times in your life. It's still Hemingway's book and not yours. If you don't create, you are just a copy machine, no more and no less.
When are you going to create your own form?
I agree that you can read Ernest Hemingway's book 10,000 times and in the end you didn't create anything and it's not yours. However I believe that if you read it and then remember it you do make it your own. If you recite it, you put your emphasis on it through your tonal qualities, thereby making it in a sense your own which will be different from others. I don't look at this as a copy machine. I think of stories of people who were prisoners of war who would recite passages of the bible to each other, to encourage each other through their ordeal. That's not be a simple copy machine. Likewise people who read scripture and gain insight into the passages meaning and write commentaries or preach sermons on it are again making something their own, not just being a copy machine. So I don't really believe the analogy applies to martial art forms.
Now people who practice forms for performance sake are really performance artists. Each time they take a form and alter it to make it more pleasing to the eye, to hopefully score a higher score, or a louder applause at the end they are making it their own, which is why even from the same school you can see the form performed differently in subtle and some not so subtle ways. I don't believe this is being a copy of something.
Then there are those people who do the forms only for rank advancement, those are to me close to what I think you mean by the term copy machines. The copy machine is only meant to reproduce the page that was scanned, whereas the karate ka who only does his form for rank advancement doesn't care if it has been altered, doesn't really care about application, hand placement etc. etc. instead they are only worried about hitting the mark close enough to pass onto the next rank. Kind of like looking at a copy of a paper that had noise on it and trying to decide can I pass this page onto the next person and can they read it.
Then you have the people who really study the form whether they care about exploring the execution of techniques, or how to apply them, their history, their meanings etc. etc. I believe these people are making the form their own while adhering to the form's structure and possibly intent. No matter how many times they do the kata (form) they are honing it, fine tuning their bodies movements, refining the application or finding new applications and understanding of the forms. This isn't mere recital or memorization of a book but immersion into the story it self; thus living it, gaining insight into it on a much deeper level than a mere copy machine.
You asked when are we going to create our own forms? I don't know, do I need to? I have taken some of the single stick forms in Modern Arnis and adapted them to: double stick, bolo, , nunchaku, and kama. I've adapted our Modern Arnis empty hand forms to kama, staff etc. etc. Likewise I've taken FMA related combative type flow drills and adapted them to Bo vs Bo, Bo vs kama, Bo vs tonfa, etc. etc. I've taken weapons forms that I never had learned applications for and then created two man drills (applications) for. I don't consider my efforts to mere copying someone else, because the adaptations of kata were mine and my students creations. Yet we had a template taught to myself (the original form) who then passed it on to my students and through lessons I came up with some adaptations and applications and they did some themselves. I don't think this is being a copy machine either.
Using someone else's kata as a base to work from helps me to understand my arts better and it stimulates growth for both my students and I as opposed to making up all things new again. That foundation has already been laid why tear it up?