The actual reason is asymptotes. I leave it as an exercise to the reader to see what happens as you divide by smaller and smaller numbers as they approach zero

The actual reason is asymptotes. I leave it as an exercise to the reader to see what happens as you divide by smaller and smaller numbers as they approach zero. In calculus you want continuity. You don't want your curve to suddenly jump to some inane location - like zero - as some have suggested for the solution to 2/0. Tragically this is a blog post where the author clearly doesn't have any math background at all.