I don't agree that most people want this, at least not if the unpleasant
outcome is so disastrous as in Olympia. If you send a large stack with
several nobles and an army that you have spent several turns building up
against a strong npc position on an island, for example, and there is a
1% chance that you get wiped out and your nobles captured and they all
get sick and die, then 99% of the time that slim chance isn't going to
matter, and that remaining 1% of the time I guarantee you that the
player it happens to won't think it is a "nice" feature of the game.