Yeah I felt a similar thing when I learned that history is frozen whilst playing fort mode ages ago. I just assumed that wars/world gen/history do continue. I went from playing obsessively every hour to not wanting to play at all. Also the sieges that appear at forts are not bound to or derived from the actual populations of goblin sites (which sort of dont exist in current release), so devastating siege after siege doesnt have any effect on the enemy civ (as I understand it) currently, which is also something which I believe will change in future releases.
Since then ive been keeping an eye on development and ive just fancied having a play recently. DF hack lets you switch between adventure mode and fort mode without abandoning a fort, which helps with feeling a bit more connected to the world you play in. Also id not played adventure mode really.
We are lucky to be playing the game in this early alpha stage, is what I tell myself when dwarf fortress disappoints. Theres really nothing like it. Minecraft is great, but is weak compared to dwarf fortress in many ways (in my opinion), even in its current state. Zangband is great, and has a few pluses DF doesnt have. Alternate Reality has some amazing features, but you cant beat a procedurally generated world for replay factor. Settlers is awesome but its best features are well emulated/utilised by DF and DF exceeeds it in many respects. Anno is similar to settlers with regards to comparisons with DF, and neither have the same scale. There are so many things in DF i love that everything I play I just come back to DF.