[watwut]

1.) I have never seen essay about mouse selection. While possible, that would be purely exercise in structure. Structure exercises exists, but again rarely about topic like mouse selection. Just a bad match to format.

2.) The style of writing in your second example would not get you good grade in writing course. Simple as that, while long enough, it is not good enough.

Depth of argument is not contradictory to good sentence structure. Or to good overall structure. The essay is not actually graded on smartness of argument, but on whether you present them well.

And yes, writing courses focuse on writing elements of text. Just like programming assignement focuses on coding and less on your work being useful.

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What you did there is trying to hack writing assignment. It typically does not work, teachers are typically not that dumb. They would however simply call that "bad writing" or "did not put in effort" rather then flattering "hacking the text".