There are certain things in life you may not be able to choose. These include, but are in no way limited to, the weather, your siblings, your employer’s mood on a particular day, the winning lottery numbers, the cost of the emergency visit from your friendly neighbourhood plumber, etc.
Some of these unchangeable things can be very stressful. Or not. What you can choose is how you deal with them and react to them. You can choose to do so in a way that will minimize stress to you, and, as an added benefit, to all the people who come in contact with you.