It also doesn't make sense because in the same scene Wuk Lamat is confident that Koana had a plan to deal with the army of robots.
Like, if you were that confident in Koana then why didn't you let us jump him? We'd literally destroy his regulator or whatever it's called in 1 GCD and then end him forever in the next.
Oh wait, forgot, we need a villain to fight for the level 99 trial and Zoraal Ja is the most obvious option, better let him retreat and power up to be a notable threat.