Not everyone is as fussy as you are I guess. Speaking for myself, I honestly don't care about framerate in games for the most part. As long as it's 30fps and steady I'm fine with it. I mean, for certain kinds of games, namely racers, fighting games, and shooters, yeah I'd prefer 60fps but if its a solid 30fps then really it's just fine to me. For some kinds of games, like 4X and turn based games, hell I really don't care what the framerate is. it's just not that big a deal to me as long as I'm having fun.
With FSX (Microsoft Flight Simulator X), if I'm getting 25fps then I'm happy as a clam in water. In large city areas I usually drop to the high teens. But then even very high end PC's choke on FSX at the highest settings...