I love having loads of unit tests that get regenerated whenever they're an inconvenience. There's a fantastic sense of progress from the size of the diff put up for review, plus you get to avoid writing boring old fashioned tests. Really cuts down on the time wasted on understanding the change you're making and leaves one a rich field of future work to enjoy.
You shouldn't need to write unit tests to understand the change you're making if you wrote a sufficiently detailed specification beforehand. Now, writing a sufficiently detailed spec is itself an art and a skill that takes practice, but ultimately when mastered it's much more efficient than writing a bunch of boilerplate tests that a machine's now perfectly capable of generating by itself.
Don't you have to review the tests to make sure they really meet the spec / test all the cases of the spec anyway? It feels a little fragile to have less oversight there compared to being able to talk to whoever wrote the test cases out or being that person yourself
