The original article is saying "The skier can travel 120 miles in one hour because he is going 120mph". The parent is saying that the skier can't travel 120 mi

The original article is saying "The skier can travel 120 miles in one hour because he is going 120mph". The parent is saying that the skier can't travel 120 miles in one hour, because even if you could find a mountain that long enough that could create a reliable path without any trees, the skier's skies would fall apart from friction (analogy breaks down here?)