If I've pasted a script into a scene and told the AI to generate the vocal tract using my AI voice, I should be able to edit solitary words or a phrase or other minor changes to this script WITHOUT the interface deciding it needs to regenerate the AI speech in it's entirety for every single edit. This makes no sense.

If I were editing a video I did of myself with me speaking, and I edited the script on a few words, then the regeneration by AI would be just for those few words that I requested an edit for.

Why is this not the same for an entire script that I paste in and I only want to add/correct a few words? Why cannot only those words be regenerated or generated without a redo of the entire script?