The Limits of Gravitational Waves

LIGO and Virgo are sensitive across a certain frequency range. One is just the size of their detector. If your detector is only a few kilometers long you can detect changes over light years right? There's like no variation across your detector. So here now we're like sitting on a huge wave if the wave is like the size of the galaxy there's no way that your little 2 kilometer ruler is going to be able to measure any change in that wave. Unless the change is really big right like the amplitude of those low frequency waves we would be able to detect them but maybe we don't get those here.