For the fun of it, of course. As that same Francois Rabelais once wrote [translation of the second order, as I do not read French] - "because to laugh is human"
To laugh at others, though, while something many humans do, is neither defining of humans nor one of out finer activities. Displays of contempt notoriously have an unsettling boomerang-like effect.
Whoever provided the quote you plagiarized probably thought the hour hands of clocks are motionless because he could not see them move. Some persistent habits take a long time to change. That doesn't mean people don't improve. It just means that those who would rather mock than help and who, like infants, prefer their gratification instant and out of a bottle may not exercise the patience to learn the truth of the matter.
Quix: Please note that this time, at the third post a self-described atheist got in before the Protestants with the express intention of mockery. Interesting, no?