Yes. First of all, not every algorithm is amenable to read-repair. Imagine, for example, storing a unique count in the database. There's no way to know how to combine divergent values in that case. (If the root value is 4, and you have two divergent values of 5, you have no idea if the increment was due to the same element or not. The right answer is either 5 or 6, but you have no idea).

More importantly, if you make a mistake, you corrupt the database. The system I described based on immutable data is human fault-tolerant, which is a critical property. If you mess up, you can always correct things.