This is the killer app for LLMs for me. I used to get super bogged down in the details of what I was trying to do, I would go a whole afternoon and while I would have started on the feature - I wouldn't have much to show for it in terms of working functionality. LLMs just provide a direction to go in and "get something up" before having to think through every little edge case and abstraction. Later once I have a a better idea of what I want, I go in and refactor by hand. But at least "it works" temporarily, and I find refactoring more enjoyable than writing fresh code anyway, primarily due to that "white page" effect you mention.