While you might like that, I am sure there are also many who would dislike it. I would count myself to them.
It is one thing to loose your best man to a stinking orc out of your own stupidity, but it would be most annoying to loose your best men every now and then to an event, that might strike whenever it cannot be more inconvenient without even the slightest chance to prevent this from happening.
It is already annoying to get a merc with the gluttonous trait because you know sooner or later he WILL get fat and there is nothing you can do against it.
Events are really cool. I like them very much as long as you have atleast two choices. Crusader Kings 2 handles the event system pretty well. This would be the best way to go in my opinion.
"I am a Paladin!"
>OMG, Malthus, there are no damn paladins in Battle Brothers...<
"OK, OK! Then I´m a wrecked down minstrel drunkard pretending to be a paladin, singing so wrong in the midst of battle that even the undead run in fear... Better?!"