Proof? What? Many don't have the same characters and many characters for these events no one invests more then they need to put in, but then at the same time, they require sometimes a Zeta to complete is not really "non-whales can do it too". This "training" event was hard simply because your characters you get were quite slow, you had to play by perma-stunning and hoping for good rng.
On the round I beat it, Thrawn didn't take a turn, EP got one turn and Vader 2, stormtroopers got a couple turns and tfp got 1. Just with that, my Old ben was killed, Han Solo was killed, and the others were on a sliver of health. The amount of damage they did on any turn is nutz, and nothing like the real game. This whole event is setup, doesn't prove anything.