Great question that hundreds guess at. If leaving the ship is "disembarkation" then it follows that boarding should be properly called "disdebarkation". You embark or you debark. The only thing nautical about the cruise industry is that it goes through the water pointy end first. And no.....you didn't hit a nerve.
Many years ago the NBC correspondent Edwin Newman, in a wonderful book called "A Civil Tongue," contended that pretense in language stems mostly from two parts of society: government and education. Not that others aren't guilty of it, but he made an effective case that lots of it starts in those two places.
If he were to write his book today I have a hunch he'd add the tech sector to the list. Not much plain speaking seems to come from that quarter either, where all the SAT scores seem to be 800 math and 300 verbal.
Well, antidisirregardless of all that, I think people should express themselves concisely.