I had a lengthy response in my mind, but this attitude leads me to believe you probably won't find much value in it.

I'll just say that sometimes, someone can explain an issue or a concept in a way that really strikes you. Maybe it's a perspective on an important issue that changes how you view it, or maybe it's an idea that opens up an entirely new avenue of thought you hadn't considered.

Sometimes that random stranger can string words together to convey the right information to the right person that positively affects their life.