A brief note rather than an argument: a few observations about reading slowly, written down to be revisited.
Once is a preview
A first reading mostly establishes what a piece is about. The structure, the turns and the parts that matter tend to show themselves on a second pass, when attention is no longer spent on finding out what happens next.
A first reading mostly establishes what a piece is about.
Marks in the margin
Writing a line or two beside a passage slows the eye down enough to notice what the passage is doing. The notes themselves are often less useful than the pause they force.
Fewer, not faster
There is a steady pull towards reading more and faster. Slowing down is partly a choice about volume: reading fewer things, and reading them in a way that lets them return later, unprompted.