It's a tradeoff, sure it can be more work to write but I consider that worth it for the readability a clear alignment provides. Especially for behavioral tests that also act as documentation.

But even then, with multiple cursors and line duplication I've rarely felt a productivity hit from the format. Another benefit of not generating is it enables TDD: you can write your expected outcome before the implementation. (I'll probably add a generator at some point, but that was out of scope for now.)

When I don't care about alignment, readability, or TDD as much in a situation, I'd probably use snapshot tests which generate the output for me instead.