The piece makes the point that a novel is about immersion in the text. Slowing down to think about the material is the opposite of the goal

It is when the forcing results from negligence rather than deliberation. In those cases, you're not being confronted with an alien, difficult, or profound concept? You're being given a broken version of a boringly ordinary concept, and wasting your brainpower on papering over an orthographic or grammatical crack that should have been cleaned up by the author, or the editor, or one of the test readers.

In these cases, you're not thinking about the material; you're thinking about carelessly it's been put together, and how little regard the author appears to have for the audience.

Not sure about that. I mean, you misspelled “superseded” and this prompted me to take some time to write this reply. Maybe I will remember your point better for so doing, but is it really the best way to reflect on the topic?

Spelling errors (especially in professionally published text) break my suspension of disbelief or train of thought and make me question both the author and editor’s language abilities. That’s not the kind of thinking I set out to do when reading.