Hah!

The converse to your claim is: the only way to exist is to intrude on other people space (by loud talking, hearing music etc).;)

Contrapositive is the logistically consistent statement, and that does not involve intruding in others’ space (depending on one’s definition of intrude, I guess).

You're right about the contrapositive, but wrong about its meaning in this context.

OP said: polite => not exist. I said: exist => not polite (the contrapositive).

Thus this very well involves potentially intruding on other people's space :)