I don't like all the hidden information in the game, either. I know some players like the "sense of discovery" it brings, but for me, hidden effects that can completely screw you over if you don't know them are some of the most frustrating game mechanics and an egregious source of additional difficulty for new players. A game where a single campaign can take dozens of hours doesn't lend itself well to being destroyed by an event a player has no real chance to foresee. Turning these into disasters would be a good choice in my opinion.
There are many more events like that, some of them even country specific. So many, in fact, that I've made it a habit to check the game files for any potential events when I play with a country I have no experience with. Poland, for example, has the very hurtful Sejm events, which you can at least avoid for a time by trying to get heirs with at least 2/2/2, or the stupidly powerful Dutch revolt. On the flipside there are the only slightly less annoying super powerful positive events that in comparison also screw you over if you don't know about them, like the Iberian Wedding, Burgundian inheritance, Vasco da Gama, etc.
In my opinion, a game is very rarely fun if it doesn't have clear rules. If I want to play something where I have no clue what rules are in place, or even if there are any, I can go to the stock market.