Have you tried sitting 10 minutes quietly without a cellphone or internet? Like being with yourself and your thoughts?
What happens when you try doing it?
Does your mind explode?

People spend money or lock themselves for ten days at vipassana. How much of this helps?

We are what we think. Observing why and what we are thinking can help with calming us. The environment around, media, and news we consume can also be the reason for this chatter.