Most people also prefer to wake up a bit after the sun rises. Daylight Savings approximates having the sun come up at the same time each day. People do not want to wake up in the dark.
If you wake up in the dark you are ensured to use the maximum amount of daylight possible. You also have the added benefit of being able to sleep until you need to get up instead of being woken up early by the sun.
Most people just go to sleep at a time such that they get enough sleep and they get up some time after sunrise. Our bodies naturally wake up with the sun. The modern clock defined world messes with our biology, and daylight savings helps correct this mismatch. Before people had clocks or times they had to show up to work, they would just get up with the sun.