Some do. Others, like Nail Some Chicks, still ask you to actively go out and kill 5 random chickens you spot with a nail gun.

(Hey, at least they're no longer timed.)
Perhaps you could consider replacing that quest (and the others like it, which are so few I cannot remember the others) with a passive quest instead? (Such as, "Kill 10 animals." Reward: 1000 bonus XP and 400 dukes at the trader.") I mean, no offense, but no one is going to scour the desert for chickens with a nail gun, even though the reward is 1 skill point.