Pick one time or the other and leave it, or split the difference (1/2) hour and be done with it.
It doesn't quite work that way, especially in northern latitudes where the difference between the "longest day of the year" and the "shortest day of the year" is greater. The whole idea is to shift the clocks to maximize the availability of sunlight during normal waking hours. That is: try keep sunrise somewhere in the vicinity between 5:30 and perhaps 7:OO AM. Stick with just one setting year 'round, and it's either going to be rising too early in the summer, or too late in the winter to maximize availability and use.
In a way, it surprises me that in even more northern latitudes, such as up in Canada, don't shift their clocks by an even greater amount, perhaps 2 hours. Or more frequently, perhaps in one hour increments four times a year instead of just twice.
I agree. If people want to shift their work schedules in the summer, that's fine. Changing clocks is idiotic. My mother used to set her clock 5 minutes ahead so she'd have a bit of margin for getting to work. Of course she got to depend on that an had to increase it to 10 minutes. By the time she retired, her clocks were 40 minutes ahead.
The function of a clock is to provide a standard. There is no reason people can't adjust their schedules around seasons without fooling with the standard.