The author ignores a variety of points, but the major one seems to be that there seems to be some ignorance about debuggers being a "line-by-line" tool. I usual

The author ignores a variety of points, but the major one seems to be that there seems to be some ignorance about debuggers being a "line-by-line" tool. I usually use it to understand big codebases, by stepping through the functions in the order they are called, and I am quite sure there isn't some other way to tackle this requirement.