If you had a choice of an hour of sunlight at 5:00AM to 6:00AM each day, OR shift that same hour to be from 9:00PM to 10:00PM
then you start to see the merit of the shift. I mean I like being an early riser, but even I got limits! For the average person the later daylight is nice for evenings with family after work.
Then again having worked in a place that had two months a year of NO daylight, and six months later 24-hour daylight, the DST didn't serve any purpose at all, LOL, (in fact working in 24-hour light is damn confusing to a body I might add).