Dude, you still don't get it, or at least you aren't approaching it from the right side of the issue.
Sure there are 532 combinations and the chances of someone else interrupting your conversation are very small. But, anyone can hear your conversation, period.
If you were looking at it as a "quiet place" perspective, that's one thing. I was looking at it as a "private place" which is another thing entirely.

So simmer down!
Brent