Information entropy. You need roughly as many syllables to explain the same concept with mono- or disyllabic English words as you do with a scientific polysyllable. Admittedly, some of it is "I know this word! See how smart I am!", but another part is how much more fluid it is to say. "Monosyllabic" rolls off the tongue a lot more easily than "having only one sound".
(The funny answer here would have been "No.")