> Keyboards have arrow keys. We shouldn't be talking about C-n/C-p in the tutorial.
The tutorial states the below:
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You can use the arrow keys,
but it's more efficient to keep your hands in the standard position
and use the commands C-p, C-b, C-f, and C-n.
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So the user is free to use the arrow keys if they desire.
As for me, I trained myself to use C-f/b/p/n instead of the arrow keys using https://github.com/magnars/hardcore-mode.el and now I almost never reach for the arrow keys. I also found the C-f/b/p/n bindings unnatural initially, but now they come up instinctively.