Fortune Teller and stacking?

[Sombre]

I think you're missing that the bad event is only prevented if it happens in the province that the FT is in, Meglobob. So in your 20+ province empire, unless you have 10 FTs in every province (which isn't possible, really) you're going to get bad events. They're more cap protection than anything else and while that's nice, it's nothing to build a strategy around.