It is not as simple as “don’t worry about things you can’t control” as if you can simply say oh I can’t control that and turn a switch off.
it is clear that some people are worriers and others aren’t for the same thing.
latest research points to worriers being more “emotionally sensitive”. The theory is that if people have been in situations where traumatic or catastrophic things happened they have a heightened sensitivity to believe the worse or be overwhelmed by low level “fear of unknown” type situations.
Other research suggest that some people have too much stress hormone rocking around their body bought about by prolonged stress rather than a specific traumatic event . This causes a poorly regulated response to low level stressors that leads to excess “worrying”
and other research says we are just born with it. Lots of longitudinal studies looking at babies and children and tracking their development into adulthood. There is a strong indications that babies who have strong reactions to novel situations tend to grow up to be more anxious. These high-reactive babies also have a hyperactive amygdala as they grow older and greater increases in heart rate and pupil dilation in response to stress, compared to others
so it ain’t that easy to just turn off worrying because you can’t control a situation. The theory is quite right in that it doesn’t help anyone to worry if you can’t do anything about it - but it is not the point
i divorced last year and now face the full burden of decision making or picking up pieces when shirt hits the fan. I do get terrible anxiety since menopause and have had to learn since living on my own to meticulously distract myself from thinking about the situation for 12-18 hours. I will put a film on tv to fully immerse myself. Or Call a friend and meet up and not talk about it. Or go to an exercise class where I have to focus on instructions. Anything that doesn’t give me head space to even think about the situation. After 12-18 hours I find subconsciously I have got past the initial shock or upset and am less stressed. Less stress means I worry less. It doesn’t completely solve the situation but can help reduce the worry by reducing the stress.