Most of those very subtle gravitational waves are also rather insignificant. Normally their effects would be swamped by other forces and interactions. At least

Most of those very subtle gravitational waves are also rather insignificant. Normally their effects would be swamped by other forces and interactions. At least as far as we know, we are the first agents in the universe to build structures that isolate and amplify those effects in a way that allows them to be perceived and appreciated. That seems pretty significant. We may also be the only means the universe has to feel proud of this little accomplishment.