His comment isn't exactly a wall of text, it's perfectly fine as it is.

I'm reading it on my computer, and it's perfectly fine; yet, how would it look like on a smartphone?

I shrunk my window's width and it still looked fine.

It is true that it amounts to the same number of words, so why would it look more like a wall of text when the text is narrower? Perhaps it has to do with the number of lines?

<p> here you go.