We'd have to change work timing too, then, to facilitate dropoffs and parents who want to watch their kids at the bus stops. And at that point, we are back where we started. Better to just not mess with the time, and stick with standard time.
If you change what time people go to work from 8 am to 9 am then you will also be changing when they get home from 5pm to 6pm. Then you have lost that extra daylight in the evening, which was the entire point of the time change!
> And at that point, we are back where we started.
Except only for people at latitudes where it's worth doing. Those people are precisely where they started, and everyone else has a much simpler year-round standard time.