I don't agree with the premise. Chunking helps to break down problems, but some problems require one to wrestle with many chunks of the problem at the same tim

I don't agree with the premise. Chunking helps to break down problems, but some problems require one to wrestle with many chunks of the problem at the same time, while building intuition. The boundaries between chunks are also not that well-defined, especially when one is working with a new problem that has no solution. Author assumes that all problems are decomposable to interrupt-proof tasks/units. This is untrue in many complex problem domains.