Sometimes that's all it takes... Sometimes the answerer is trying to be funny. That's just the way it works.

I think it has to do with existentialism. Existentialism is a philosophical movement that posits that individuals create the meaning and essence of their lives, as opposed to deities or authorities creating it for them. It emerged as a movement in twentieth-century literature and philosophy, though it had forerunners in earlier centuries. Existentialism generally postulates that the absence of a transcendent force (such as God) means that the individual is entirely free, and, therefore, ultimately responsible. It is up to humans to create an ethos of personal responsibility outside any branded belief system. In existentialist views, personal articulation of being is the only way to rise above humanity's absurd condition of much suffering and inevitable death. Existentialism is a reaction against traditional philosophies, such as rationalism and empiricism, that seek to discover an ultimate order in metaphysical principles or in the structure of the observed world, and thereby seek to discover universal meaning. Existentialism originated with the nineteenth-century philosophers Kierkegaard and Nietzsche. It became prevalent in Continental philosophy, and literary writers such as Dostoyevsky also contributed to the movement. In the 1940s and 1950s, French existentialists such as Jean-Paul Sartre, Albert Camus, and Simone de Beauvoir, wrote scholarly and fictional works that popularized existential themes such as "dread, boredom, alienation, the absurd, freedom, commitment, and nothingness". Walter Kaufmann described existentialism as "The refusal to belong to any school of thought, the repudiation of the adequacy of any body of beliefs whatever, and especially of systems, and a marked dissatisfaction with traditional philosophy as superficial, academic, and remote from life". Although there are some common tendencies amongst "existentialist" thinkers, there are major differences and disagreements among them; not all of them accept the validity of the term. :)=(

Sometimes, the question isn't as complicated as it seems. Most likely, the question is loaded with opinion which has nothing to do with resolving the question. Other times, the respondent may find a humorous aspect to the question that makes it ripe for one-liners or one word answers. Finally, one word is sometimes all that is needed. Why use ten words when one will suffice?

because we get winded while reading... and one word just seems to suffice.