It is indeed better to be quiet than to speak absolute nonsense. You have given great insight into this subject. You have brought up points i have never even thought about. I am the quiet type so i don't talk much, however, i value meaningful conversation. I avoid conversations that add no value to my life, these are rather time wasters.
I enjoyed reading your views on this subject. It inspires deep thoughts.
You're blessed if you have the freedom to avoid the conversations that add no value to your life. Sometimes avoiding conversation can be as much of an art as conversation itself.