if wars were modeled the eu2 very detailed historical way, the provinces you conquered would often simply defect historically rather than actually being conquered.. like when you win the hundred years war against france as england, suddenly the war is over, you're told that you lost and you lose all of your french holdings. that's linear gameplay when it's worst.
i want that scenario too, but even if we didn't go by the eu2 model which was linear, the more dynamic things are, the less you are in control; if the whole world acts without your consent, making an empire conquering you outside your control... it's frustrating for many players
although this particular project is more about worldbuilding and immersion than actual empirebuilding i think
edit: and no, i didn't talk about wars in particular, it was more... well, most social/industrial events happening as they did. i never talk about warfare, i often talk about the other stuff while knowing nothing about either. i do know, however, that materialist history is, in the end, somewhat deterministic and while the ways things happen might vary (like exactly which guy invented the lightbulb and when) things are bound to end up in some concrete situation (electrical revolution in western europe and the us)
and sorry for the format, i'm not capitalizing a lot atm. it's also generally a hint that you should listen to other people more, like dachs, because i'm not that smart with most things