The Lips Don't Care...

So here's a saying that has been forming in my mind. Let me know what you think...

The lips don't care about the tongue.

They only care about air.

The horn doesn't care about the lips.
It only cares about vibration.

The audience doesn't care about the horn.
They only care about sound.

Perhaps it then follows that you should...

Focus more on: Air, Vibration, Sound

Focus less on: tongue, lips, horn