I said his book, which makes further arguments: https://link.springer.com/book/10.1007/978-3-030-42019-2

And your rebuttal amounts to "if I let you mess with a trivial number of amplitudes then the error will be trivial". Well duh. Another way of phrasing what you said is that you need to control 90% of 2^2048 amplitudes. Which is Dyakanov's point, that nobody knows how to do this.