I think the author has a certain writing style that you apparently dislike, which is fine, but it’s hardly slop. I agree that the comparison between Sketch being somewhat unreliable but fast undercuts the claim that speed and reliability often go hand-in-hand — though one could argue that the modifier “often” saves it.

I’ve found that writers who self-profess to have ADHD often write in this way, with multiple, seemingly disparate points being made that can tie together if you squint. As an ADHD person who enjoys writing, it makes sense, and at least in my head, these points always connect; I’m just not great at demonstrating how they connect. I’ve no idea if the author is neurodivergent, but it’s one possible explanation.