1. The lack of a good spaced repetition algorithm.
2. You'll end up with an order of magnitude fewer flash cards. When it's easy to copy/paste, there's no way you can create all the flashcards you need by hand in a decent amount of time.
> The flexibility of being able to dynamically generate a ton of Anki cards using a script is trumped by just using ChatGPT ...
I would never advocate doing it with a script. All my flashcards were created by me - either by typing or selective copy/paste.