We spend our weekdays dealing with stressful situations at work, stressful situations on our commute and stressful situations with other family members sometimes. Basically, as humans, we deal with a lot of stress. Unfortunately, there is no way to avoid it.
If you want to unwind, relax and let your worries melt away, go for the day. It is plain and simple, fishing calms you down. You are out in nature, enjoying the singing birds, cascading river and cool breeze with no computer to stare at. Your brain can focus on one simple task; to catch fish.