i've been thinking exactly about that today, ck2 is the only gsg with emergent storytelling
you don’t remember ck campaigns because you restored the roman empire, no, you play to watch your crippled, gluttonous son lose half the kingdom to a peasant uprising because he insulted the wrong bishop. you remember the time your wife converted to catharism and tried to murder your kids or when your celibate monk-king took a concubine, fathered a bastard genius, and died in a duel with a horse. every dynasty is a saga, not just a stat sheet
meanwhile in other gsgs, it’s mostly just borders shifting colors and modifiers changing numbers. it's the same castile forming spain, muscovy forming russia, prussia forming north german federation and then germany. even when you try to break the mold say, by industrializing egypt or turning brazil fascist, you're still working against a rigid framework of literacy rates, factory throughput, and infamy timers.
the most “emergent” event is maybe a jacobin rebellion installing a bourgeois dictatorship and even then, the result is the same slider-tweaks with a different flag.
in ck2, you can play as the khazar jewish king, get conquered, and then somehow return from exile 150 years later by marrying your way into the byzantine court and pressing a dubious claim. while in vic2, you’re not telling a story, you’re waiting for tech to let you build a cement factory. it’s the difference between "what story will this campaign tell?" and "how can i optimize literacy to compete with britain?"