I don’t have a medical background, but my suspicion is the process of formulating a thought, deciding what meaning you want to convey, and then settling on what words accomplish that is far more complicated and delicate than we give it credit for. I suspect any sort of issue can wreck the whole process, which might explain why really good communicators are so rare.
For myself, ADHD medication really helps slow my brain down and thinking things through before opening my mouth. Turns out that’s an important part in (properly) verbalizing thoughts.
I think you are broadly correct in that we can’t snap our fingers and simply change the amount of money flowing back to the coffee bean growers. However, I’m highly skeptical there’s any inherent reason why markets should spread the profits this unevenly. If no one was growing coffee beans there wouldn’t be any coffee shops either.
The questions you should be thinking about is why are the profits so unevenly distributed? Market forces, of course, but how much are these forces inherent or created? If they were created, what caused it to be the way it is? Would a system born out of powerful countries trying to advance their own interests (cheaper materials) and willing to exploit power imbalances to do so be an explanation?