It is impossible to control something if you cannot detect or measure it.
Once they can detect and/or measure gravity waves, then they can be explored further for control.
The identification of actual gravity waves would be a major step in physics.
It would nicely explain how some days, time seems to fly right by, while other days, it seems to linger,...just riding the gravity wave.
And govt/warfare. Zero on target > press button > instant pancake.
A Socialist’s wet-dream. Instant compliance