In the assassination's problem, people manipulate the market to win bets. No one is doing that in this case.
Also, knowing when wars will happen is socially beneficial because uncertainty increases the probability of war. If both sides think they are strong, they both take strong bargaining positions. When their offers are rejected they fight. More knowledge -> bargains are more likely to be accepted.
I think the “for just 11 generations” thing is obviously a joke. Obviously they can’t influence the culture of their kids by that much.
Same thing with the old Epstein “impregnate 20 women in a day” thing. It’s obviously impossible.