But that isn't true if my company tells me "you have to work between this hour and that hour". I can change my alarms till the cows come home but it means nothing. Moreover, the majority can have an effect on what government we have, but we can't have an effect on what business decisions are. Because business leaders are a small subset of the community. If they naturally have an interest in not setting separate working hours summer and winter and employees naturally do have an interest in setting separate working hours summer and winter, the only plausible mechanism available to the employees (who need to work if they want to feed their family and can't afford to gratuitously quit in the hope of finding a job that doesn't exist) is to change the clocks.
You're not obliged to follow us. If you don't like daylight savings, you can set your own alarms in the summer and winter differently. It will be no harder for you to do that than it will be for me to do that. If it was as trivial as you make it out to be, you wouldn't even utter a breath in complaint because it would be so easy for you to do it that you just wouldn't notice. But social realities mean that changing the clocks is the best route available to us, and so that's what our societies have settled on.