TimeZones and DST are for humans and physical realities, such as the tilt of the earth and circadian rhythms. And they serve to address these things in a universal, coordinated way rather than asking each of us to change our schedules individually.
During DST, we all agree to start our days, open our business, and adjust our schedules one hour earlier, but without changing our individual clock times.
With DST all year long, can we choose to send our children to school at 9:30 instead of 8:30 during the winter? Should the school have a different winter schedule than a summer one? Or should we just wake up our young children well before dawn and drag them off?