Its more of an issue of not having enough players on one side. For example, maybe 1 player on Light side waiting, and 3 Dark side players. So they put 3 vs 3, but Light side has two AI.
Yes he can concede, but thats a waste of time for everyone. If there was an auto balance feature, one person willingly can move to Light side to balance.
That or bump the AI from Easy to Hard difficulty so at least he lives longer with buffs.