Excactly!
There's no logical argument for the time change. None. The farming argument doesn't make any sense. Farmers don't give a rip what the wall-time is. They get up when it's time to get up and get the work done. They go to bed when the work day is done and they're sleepy. If you have to get up at 3:30 to milk the cows, you get up at 3:30. If the wall clock suddenly says it's 4:30, you still get up at the same time because the cows, corn, and sun don't give a flying FSCK what the wall clock says.
As far as providing more natural light in offices, that may have been true in 1930 when buildings were built without central HVAC with window access for everyone in mind. Though there's precious little evidence that DLS made a bit of difference in the then either. Now all but the "greenest" buildings (and some WalMarts) have their lights on during the work day weather the sun is shining or its pitch black outside.
And my rant continues with the horrible effects on your health. Suddenly changing humans sleep patterns is terrible for general healthfulness and sleep cycles.
In short take your DLS and shove it where the sun will never shine