Because there's no point to play on when you're clearly lost.
Especially in vote chess, when you are not only wasting your own time, and that of one opponent, but that of two whole teams who would all probably prefer to start a new meaningful game instead of flogginf a dead horse.
I'm trying to understand why someone would resign a game of chess, rather than playing the thing down to the bitter end. Outside of "I don't have time," which I understand, but particularly in the vote chess, I notice people are so keen to quit when the chips are down. Just curious as to why. Thoughts?