>I was under the impression that people can decide for themselves the times when they want to go to bed and wake up.
That's correct, and most people choose times that are roughly in sync with the people around them. Waking up an hour earlier is less useful if the gym isn't open an hour earlier, or your favourite breakfast stall isn't open an hour earlier etc.
If your life is so strictly scheduled that you can't adjust parts of it an hour or two in either direction, or swap morning activities with evening activities, your problems are bigger than daylight savings time.
Some people work 2nd or 3rd shift, and a few of them even do it by choice. If you think moving things around by one hour is difficult, try shifting them eight hours. Those people still manage, though they often acquire sleep-related health problems and have to deal with more inconveniences in their daily life.
That's correct, and most people choose times that are roughly in sync with the people around them. Waking up an hour earlier is less useful if the gym isn't open an hour earlier, or your favourite breakfast stall isn't open an hour earlier etc.